LAST UPDATED : 31/10/2021 | 06:30AM

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DPP - 01NIOS : Daily Practice Problems - Environmental Science (333) - 31/10/2021

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Q1. Define the terms : Ecology, niche, species, extinction.
Q2. What do you understand by ‘Variation and Natural Selection’? In what way do they interact to cause evolution?
Q3. What is the role of isolation in the formation of new species and keeping them distinct.
Q4. In what ways have humans caused the extinction of species?
Q5. What do you understand by (i) natality (ii) speciation (iii) mutation (iv) extinction
Q6. Explain ‘ecological succession’.
Q7. State and explain community characteristics.
Q8. What are (i) climax community and (ii) pioneer species?
Q9. Write an essay on biotic interaction.
Q10. Define biotic Interaction. Describe any one type of positive, negative and neutral quotation
Q11. Define the following terms.
(i) Autotrophs
(ii) Heterotrophs
(iii) Primary carnivores
(iv) Saprotophs
(v) Omnivores
Q12. Give reasons whether the following statements are true or false.
(i) Food chains are more stable than food webs.
(ii) Pyramids of energy are never inverted where as pyramid of biomass may be inverted
(iii) A detritus food chain begins with autotrophs.
(iv) Phytoplankton is the term applied to floating organisms in a pond.
(v) Aphotic is the upper zone of a pond.
Q13. Give reasons for the following statements:
(i) We see more wall lizards near the tube light during summer.
(ii) Energy pyramids are never inverted.
(iii) We can not directly use atmospheric nitrogen.
(iv) There is higher concentration of cabon dioxide in the aphotic zone.
(v) Food chains have a limited number of steps
Q14. What is an ecosystem? Explain its structural components.
Q15. Define decomposers and give their role in sustaining an ecosystem.
Q16. Why are ecosystems dynamic in nature? Give the various functional components of an ecosystem.
Q17. What is an ecological pyramid? Define and differentiate between different pyramid of energy and pyramid of numbers.
Q18. List the various steps of nitrogen cycle in a sequence.
Q19. The following organisms were identified in a pond ecosystem-Spirogyra, Euglena, Hydra, Daphnia, arthropod larvae, bass and sunfish. Make a food web and identify the trophic level of each one of them.
Q20. What do you understand by natural ecosystem ? Give examples.
Q21. Give differences between the following:
a. Alpine and arctic tundra
b. Savanna and prairie
c. Tropical and temperate forests
Q22. What do you understand by biodiversity? Explain its significance.
Q23. Give two desert adaptations of plants and animals.
Q24. Describe the various types of forest found in India (in brief).
Q25. Explain various zones of Himalayas.
Q26. Write short note on grassland and deserts found in India.
Q27. Explain how deforestation has resulted in ecological imbalance.
Q28. What is an ecotone? Explain its significance for the edge species.
Q30. Give two methods of protecting natural ecosystems.

DPP - 01CBSE : Daily Practice Problems - SCIENCE - 07/11/2021 - BIOLOGY

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BIOLOGY :

Q1. How are fats digested in our bodies? Where does this process take place?
Q2. What is the role of saliva in the digestion of food?
Q3. What are the necessary conditions for autotrophic nutrition and what are its byproducts?
Q4. What are the differences between aerobic and anaerobic respiration? Name some organisms that use the anaerobic mode of respiration.
Q5. How are the alveoli designed to maximise the exchange of gases?
Q6. What would be the consequences of a deficiency of haemoglobin in our bodies?
Q7. Describe double circulation of blood in human beings. Why is it necessary?
Q8. What are the differences between the transport of materials in xylem and phloem?
Q9. Compare the functioning of alveoli in the lungs and nephrons in the kidneys with respect to their structure and functioning.
Q10. What are the components of the transport system in human beings? What are the functions of these components?
Q11. Why is it necessary to separate oxygenated and deoxygenated blood in mammals and birds?
Q12. What are the components of the transport system in highly organised plants?
Q13. How are water and minerals transported in plants?
Q14. How is food transported in plants?
Q15. What advantage over an aquatic organism does a terrestrial organism have with regard to obtaining oxygen for respiration?
Q16. What are the different ways in which glucose is oxidised to provide energy in various organisms?
Q17. How is oxygen and carbon dioxide transported in human beings?
Q18. How are the lungs designed in human beings to maximise the area for exchange of gases?

      DPP - 01NIOS : Daily Practice Problems - SOCIAL SCIENCE(213) - 22/10/2021 - HISTORY

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HISTORY :

Q1. How are different disciplines under social science interlinked with each other?Discuss with the help of examples.
Q2. Do you think studying History is necessary and important? Give reasons for your stand.
Q3. What is the relationship between Archaeology and History?
Q4. How do other sub-disciplines of social science contribute in the understanding of human civilisation?
Q5. Write a short note on the factors that led to the rise of community and social life during Chalcolithic and Bronze Age.
Q6. What was the importance of the discovery of fire?
Q7. Explain briefly the subject matter of economics.
Q8. Economists are very important for a country. Do you agree? Why?
Q9. Find out why plastic bags need to be banned. Prepare a Project bringing out the advantages and disadvantages of metal and plastic
Q10. How did the Bronze Age mark a shift from the New Stone Age?
Q11. What were the important features of the Harappa Civilisation?
Q12. Discuss how did the discovery of iron bring in radical changes in the lives of the people?
Q13. Describe the Roman society and economy during 5th century BC
Q14. Describe the social, religious and economic life of the Early Vedic people.
Q15. What is ‘dhamma’ according to Ashoka?
Q16. Write a short note on India’s contribution to World Civilisation.
Q17. Which was the first metal used by human beings?
Q18. Name the rivers between which the Mesopotamian Civilisation was founded.
Q19. Name the ancient Egyptian script.
Q20. Name at least four sites of the Harappa Civilisation situated in India.
Q21. Explain why the Medieval Period is a significant period that needs to be studied to understand the evolution of human society?
Q22. Describe the changes that took place in the political and economic life in Western Europe after the downfall of the Roman Empire.
Q23. Examine the main features of Medieval Indian economy.
Q24. What are the main teachings of Islam? Discuss in about 100 words.
Q25. ‘Arab Civilisation in the Medieval Period left behind a legacy of sicoveries and achievements’. Justify this statement.
Q26. Differentiate between Iqtadars and Mansabs.
Q27. What were the important teachings of the Bhakti Movement and Sufism? How did acted as a bridge between the Hindus and the Muslims?
Q28. Illustrate how Medieval Indian culture represented a harmonious synthesis of traditions in the fields of arts, architecture and music.
Q29. How did the rise of towns and emergence of trade led to the decline of feudalism?
Q30. Why do you think Renaissance marks a break from earlier patterns of thought and existence? Write in about 100 words.
Q31. How did the Reformation impact Europe and the rest of the world?
Q32. How did the discovery of new lands change the economy and society in the modern world?
Q33. Enlist the main ideas given in the Declaration of American Independence.
Q34. Which ideas of the French Revolution had an impact on the world order?
Q35. Discuss the strategies used by the German and Italian leaders for their unification.
Q36. Describe the conditions of the industrial workers which influenced the Russian Revolution.

      DPP - 01NIOS : Daily Practice Problems - SCIENCE & TECHNOLOGY(212) - 20/10/2021

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BIOLOGY :

Q1. Define biodiversity. Mention its three levels and briefly explain them.
Q2. What are the global and Indian patterns of biodiversity? What do you mean by a 'hot spot' of diversity?
Q3. Name the three domains of life and state one distinguishing features of each.
Q4. Name the five kingdoms of life and state one feature of each of the kingdoms which differs from that of the others.
Q5. Give an account of the classification of Kingdom Plantae into its divisions. Cite examples.
Q6. State the difference between chordates and non chordates.
Q7. Name the phyla to which the following belong: wolf, earthworm, sponge, jelly fish, sparrow, butterfly, starfish, snail, tape worm, round worm
Q8. To which class of chordates do the following belong? Justify your inclusion into the class by stating any one characteristic feature. Crow, lion, cobra, flying frog, shark, fresh water fish.
Q9. Write three sentences on why we need to classify and give scientific names to organisms.
Q10. Why does biodiversity need to be conserved?
Q11. State three ways by which biodiversity may be conserved?
Q12. List 10 ways in which organisms help each other survive in nature. What message can you derive from their interdependence?
Q13. Why have some plants and animals become endangered? State atleast five human activities as causes.
Q14. Write in a paragraph on "what would happen if living beings did not have scientific names and were not grouped." Mention atleast five consequences.
Q15. You find some boys pelting stones at a monkey sitting on a tree. Write five sentences which can dissuade those boys.
Q16. Mention Darwin’s two major contributions to evolutionary ideas.
Q17. Write a note on NeoDarwinism.
Q18. Name the kind of plant tissue found
(i) at the growing parts of the plant.(ii) at the root tip.(iii) in vascular bundles.(iv) in the inner lining of the intestine.
(v) Connecting the adjacent muscle fibres
Q19. What is a balanced diet? Name three items of a diet that provide three different nutrients?
Q20.What are the main steps of photosynthesis? Is sunlight essential for photosynthesis and why?
Q21. A patient complains of lack of appetite, exhaustion and is losing weight. Diagnose the deficiency. What kind of diet would you suggest for the patient?
Q22. Deficiency of which vitamin causes night blindness. What would you suggest to prevent this deficiency?
Q23. Where does the digestion of starch, proteins and fats take place and what is the role played in digestion by liver and pancreas?
Q24. Which component in your diet will not be digested

DATE SHEET - LECTURES TIME - TABLE
CL- MAT11
20/Oct/2021 -  Chapter 1 Sets - Upcoming lecture ( Offline Mode )
20/Oct/2021 -  Chapter 2 Relations and Functions - Upcoming lecture ( Offline Mode )
22/Oct/2021 -  Chapter 3 Trigonometric Functions
23/Oct/2021 -  Chapter 4 Principle of Mathematical Induction
25/Oct/2021 -  Chapter 5 Complex Numbers and Quadratic Equations
27/Oct/2021 -  Chapter 6 Linear Inequalities
28/Oct/2021 -  Chapter 7 Permutations and Combinations
29/Oct/2021 -  Chapter 8 Binomial Theorem
30/Oct/2021 -  Chapter 9 Sequences and Series
01/Nov/2021 - Chapter 10 Straight lines
06/Nov/2021 - Chapter 11 Conic Sections
08/Nov/2021 - Chapter 12 Introduction to Three Dimensional Geometry
13/Nov/2021 - Chapter 13 Limits and Derivatives
17/Nov/2021 - Chapter 14 Mathematical Reasoning
18/Nov/2021 - Chapter 15 Statistics
19/Nov/2021 - Chapter 16 Probability
CL- MAT12
20/Nov/2021 - Chapter 1 Relations and Functions
21/Nov/2021 - Chapter 2 Inverse Trigonometric Functions
22/Nov/2021 - Chapter 3 Matrices
23/Nov/2021 - Chapter 4 Determinants
24/Nov/2021 - Chapter 5 Continuity and Differentiability
25/Nov/2021 - Chapter 6 Applications of Derivatives
27/Nov/2021 - Chapter 7 Integrals
02/Dec/2021 - Chapter 8 Applications of Integrals
04/Dec/2021 - Chapter 9 Differential Equations
08/Dec/2021 - Chapter 10 Vector Algebra
12/Dec/2021 - Chapter 11 Three dimensional Geometry
14/Dec/2021 - Chapter 12 Linear Programming
15/Dec/2021 - Chapter 13 Probability
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CL- PHY11
16/Dec/2021 - Chapter 1: Physical World
17/Dec/2021 - Chapter 2: Units and Measurements
18/Dec/2021 - Chapter 3: Motion in a Straight Line
19/Dec/2021 - Chapter 4: Motion in a Plane
20/Dec/2021 - Chapter 5: Laws of Motion
21/Dec/2021 - Chapter 6: Work, Energy, and Power
22/Dec/2021 - Chapter 7: System of Particles and Rotational Motion
24/Dec/2021 - Chapter 8: Gravitation
27/Dec/2021 - Chapter 9: Mechanical Properties of Solids
28/Dec/2021 - Chapter 10: Mechanical Properties of Fluids
02/Jan/2022 - Chapter 11: Thermal Properties of Matter
03/Jan/2022 - Chapter 12: Thermodynamics
05/Jan/2022 - Chapter 13: Kinetic Theory
06/Jan/2022 - Chapter 14: Oscillations
08/Jan/2022 - Chapter 15: Waves
CL- PHY12
09/Jan/2022 - Chapter 1: Electric Charges and Fields
10/Jan/2022 - Chapter 2: Electrostatic Potential and Capacitance
11/Jan/2022 - Chapter 3: Current Electricity
12/Jan/2022 - Chapter 4: Moving Charges and Magnetism
13/Jan/2022 - Chapter 5: Magnetism and Matter
14/Jan/2022 - Chapter 6: Electromagnetic Induction
15/Jan/2022 - Chapter 7: Alternating Current
16/Jan/2022 - Chapter 8: Electromagnetic Waves
17/Jan/2022 - Chapter 9: Ray Optics and Optical Instruments
18/Jan/2022 - Chapter 10: Wave Optics
19/Jan/2022 - Chapter 11: Dual Nature of Radiation and Matter
20/Jan/2022 - Chapter 12: Atoms
21/Jan/2022 - Chapter 13: Nuclei
22/Jan/2022 - Chapter 14: Semiconductor Electronics: Materials, Devices and Simple Circuits
23/Jan/2022 - Chapter 15: Communication Systems
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CL- CHE11
24/Jan/2022 - Chapter 1: Some Basic Concepts of Chemistry
25/Jan/2022 - Chapter 2: Structure of Atom
26/Jan/2022 - Chapter 3: Classification of Elements and Periodicity in Properties
27/Jan/2022 - Chapter 4: Chemical Bonding and Molecular Structure
28/Jan/2022 - Chapter 5: States of Matter
29/Jan/2022 - Chapter 6: Thermodynamics
30/Jan/2022 - Chapter 7: Equilibrium
31/Jan/2022 - Chapter 8: Redox Reactions
01/Feb/2022 - Chapter 9: Hydrogen
02/Feb/2022 - Chapter 10: The s-Block Elements
03/Feb/2022 - Chapter 11: The p-Block Elements
04/Feb/2022 - Chapter 12: Organic Chemistry – Some Basic Principles & Techniques
05/Feb/2022 - Chapter 13: Hydrocarbons
06/Feb/2022 - Chapter 14: Environmental Chemistry
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CL- CHE12
06/Feb/2022 - Chapter 1: The Solid State
07/Feb/2022 - Chapter 2: Solutions
08/Feb/2022 - Chapter 3: Electrochemistry
09/Feb/2022 - Chapter 4: Chemical Kinetics
10/Feb/2022 - Chapter 5: Surface Chemistry
11/Feb/2022 - Chapter 6: General Principles and Processes of Isolation of Elements
12/Feb/2022 - Chapter 7: The p-Block Elements
13/Feb/2022 - Chapter 8: The d & f Block Elements
14/Feb/2022 - Chapter 9: Coordination Compounds
15/Feb/2022 - Chapter 10: Haloalkanes and Haloarenes
16/Feb/2022 - Chapter 11: Alcohols, Phenols, and Ethers
17/Feb/2022 - Chapter 12: Aldehydes, Ketones, and Carboxylic Acids
18/Feb/2022 - Chapter 13: Amines
19/Feb/2022 - Chapter 14: Biomolecules
20/Feb/2022 - Chapter 15: Polymers
21/Feb/2022 - Chapter 16: Chemistry in Everyday Life
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CL- BIO11
22/Feb/2022 - Chapter 1 Reproduction in Organisms
23/Feb/2022 - Chapter 2 Sexual Reproduction in Flowering Plants
24/Feb/2022 - Chapter 3 Human Reproduction
25/Feb/2022 - Chapter 4 Reproductive Health
26/Feb/2022 - Chapter 5 Principles of Inheritance and Variation
27/Feb/2022 - Chapter 6 Molecular Basis of Inheritance
01/MAR/2022 - Chapter 7 Evolution
02/MAR/2022 - Chapter 8 Human Health and Diseases
03/MAR/2022 - Chapter 9 Strategies for Enhancement in Food Production
04/MAR/2022 - Chapter 10 Microbes in Human Welfare
05/MAR/2022 - Chapter 11 Biotechnology Principles and Processes
06/MAR/2022 - Chapter 12 Biotechnology: and its Application
07/MAR/2022 - Chapter 13 Organisms and Populations
11/MAR/2022 - Chapter 14 Ecosystem
12/MAR/2022 - Chapter 15 Biodiversity and Conservation
13/MAR/2022 - Chapter 16 Environmental Issues
CL- BIO12
14/MAR/2022 - Chapter 1 The Living World
15/MAR/2022 - Chapter 2 Biological Classification
16/MAR/2022 - Chapter 3 Plant Kingdom
17/MAR/2022 - Chapter 4 Animal Kingdom
18/MAR/2022 - Chapter 5 Morphology of Flowering Plants
19/MAR/2022 - Chapter 6 Anatomy of Flowering Plants
20/MAR/2022 - Chapter 7 Structural Organisation in Animals
21/MAR/2022 - Chapter 8 Cell The Unit of Life
22/MAR/2022 - Chapter 9 Biomolecules
23/MAR/2022 - Chapter 10 Cell Cycle and Cell Division
24/MAR/2022 - Chapter 11 Transport in Plants
25/MAR/2022 - Chapter 12 Mineral Nutrition
26/MAR/2022 - Chapter 13 Photosynthesis in Higher Plants
27/MAR/2022 - Chapter 14 Respiration in Plants
28/MAR/2022 - Chapter 15 Plant Growth and Development
29/MAR/2022 - Chapter 16 Digestion and Absorption
30/MAR/2022 - Chapter 17 Breathing and Exchange of Gases
31/MAR/2022 - Chapter 18 Body Fluids and Circulation
01/APR/2022 - Chapter 19 Excretory Products and their Elimination
02/APR/2022 - Chapter 20 Locomotion and Movement
03/APR/2022 - Chapter 21 Neural Control and Coordination
04/APR/2022 - Chapter 22 Chemical Coordination and integration
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      DPP - 01NIOS : Daily Practice Problems - GEOGRAPHY(316) - 07/10/2021

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Q1. What is meant by internal forces? List causes of the origin of these forces.
Q2. Give four examples to prove that the earth’s crust is unstable.
Q3. Draw diagrams to show
(i) Displacement of rock strata along a fault plane,
(ii) Anticline and synclines of rock strata.
Q4. Differentiate between vertical and horizontal movements.
Q5. Distinguish between folding and faulting.
Q6. What is a volcano? Describe different types of volcanoes with examples.
Q7. Distinguish between acid and basic lava and land forms developed by each of them.
Q8. What causes an earthquake?
Q9. List the effects of earthquakes on earth’s surface.
Q10. Define the following terms: (a) Fault plane (b) Central type eruption (c) Fissure type eruption (d) Dormant volcano.
Q11. Answer briefly the following questions :
(a) In what different ways does a river transport its load?
(b) List out factors which affect (1) energy of a stream and (2) carrying capacity of streams.
(c) In what different ways is the work of river erosion accomplished?
Q12. Distinguish between the following pairs:(a) estuary and deltas (b) flood plain and braided stream
Q13. The following landforms have been formed by rivers. Group them under erosional and depositional features. Gorge, V -shaped valley, meander, flood plain, alluvial fan, and canyon.
Q14. Explain the formation of the following with suitable diagrams: (a) Oxbow lake (b) Delta
Q15. Explain systematically the work of river as an agent of gradation at each of the three stages of its course.
Q16. Answer the following questions in brief:
(a) Explain the meaning of the term underground water.
(b) How do streams in limestone regions suddently disappear?
(c) Why is construction of rails and roads difficult in areas of sinkholes.
(d) Permanent watertable and temporary watertable.
(e) Sinkhole and swallow hole. (f) Stalactite and stalagmite.
(g) Permeable rocks and impermeable rocks. (h) Hot spring and geyser.
Q17. What is meant by ‘Karst’ topography? Name any five topographical features of karst topography and explaion any two of these with the help of diagrams.

Q2. If the diagonals of a parallelogram are equal, then show that it is a rectangle.
Solution:
Let ABCD is a parallelogram such that AC = BD.

In ∆ABC and ∆DCB,
AC = DB [Given]
AB = DC [Opposite sides of a parallelogram]
BC = CB [Common]
∴ ∆ABC ≅ ∆DCB [By SSS congruency]
⇒ ∠ABC = ∠DCB [By C.P.C.T.] …(1)
Now, AB || DC and BC is a transversal. [ ∵ ABCD is a parallelogram]
∴ ∠ABC + ∠DCB = 180° … (2) [Co-interior angles]
From (1) and (2), we have
∠ABC = ∠DCB = 90°
i.e., ABCD is a parallelogram having an angle equal to 90°.
∴ ABCD is a rectangle.

Q3. Show that if the diagonals of a quadrilateral bisect each other at right angles, then it is a rhombus.
Solution:
Let ABCD be a quadrilateral such that the diagonals AC and BD bisect each other at right angles at O.

∴ In ∆AOB and ∆AOD, we have
AO = AO [Common]
OB = OD [O is the mid-point of BD]
∠AOB = ∠AOD [Each 90]
∴ ∆AQB ≅ ∆AOD [By,SAS congruency
∴ AB = AD [By C.P.C.T.] ……..(1)
Similarly, AB = BC .. .(2)
BC = CD …..(3)
CD = DA ……(4)
∴ From (1), (2), (3) and (4), we have
AB = BC = CD = DA
Thus, the quadrilateral ABCD is a rhombus.
Alternatively : ABCD can be proved first a parallelogram then proving one pair of adjacent sides equal will result in rhombus.

Q4. Show that the diagonals of a square are equal and bisect each other at right angles.
Solution:
Let ABCD be a square such that its diagonals AC and BD intersect at O.

(i) To prove that the diagonals are equal, we need to prove AC = BD.
In ∆ABC and ∆BAD, we have
AB = BA [Common]
BC = AD [Sides of a square ABCD]
∠ABC = ∠BAD [Each angle is 90°]
∴ ∆ABC ≅ ∆BAD [By SAS congruency]
AC = BD [By C.P.C.T.] …(1)

(ii) AD || BC and AC is a transversal. [∵ A square is a parallelogram]
∴ ∠1 = ∠3
[Alternate interior angles are equal]
Similarly, ∠2 = ∠4
Now, in ∆OAD and ∆OCB, we have
AD = CB [Sides of a square ABCD]
∠1 = ∠3 [Proved]
∠2 = ∠4 [Proved]
∴ ∆OAD ≅ ∆OCB [By ASA congruency]
⇒ OA = OC and OD = OB [By C.P.C.T.]
i.e., the diagonals AC and BD bisect each other at O. …….(2)

(iii) In ∆OBA and ∆ODA, we have
OB = OD [Proved]
BA = DA [Sides of a square ABCD]
OA = OA [Common]
∴ ∆OBA ≅ ∆ODA [By SSS congruency]
⇒ ∠AOB = ∠AOD [By C.P.C.T.] …(3)
∵ ∠AOB and ∠AOD form a linear pair.
∴∠AOB + ∠AOD = 180°
∴∠AOB = ∠AOD = 90° [By(3)]
⇒ AC ⊥ BD …(4)
From (1), (2) and (4), we get AC and BD are equal and bisect each other at right angles.

Q5. Show that if the diagonals of a quadrilateral are equal and bisect each other at right angles, then it is a square.
Solution:
Let ABCD be a quadrilateral such that diagonals AC and BD are equal and bisect each other at right angles.

Now, in ∆AOD and ∆AOB, We have
∠AOD = ∠AOB [Each 90°]
AO = AO [Common]
OD = OB [ ∵ O is the midpoint of BD]
∴ ∆AOD ≅ ∆AOB [By SAS congruency]
⇒ AD = AB [By C.P.C.T.] …(1)
Similarly, we have
AB = BC … (2)
BC = CD …(3)
CD = DA …(4)
From (1), (2), (3) and (4), we have
AB = BC = CD = DA
∴ Quadrilateral ABCD have all sides equal.
In ∆AOD and ∆COB, we have
AO = CO [Given]
OD = OB [Given]
∠AOD = ∠COB [Vertically opposite angles]
So, ∆AOD ≅ ∆COB [By SAS congruency]
∴∠1 = ∠2 [By C.P.C.T.]
But, they form a pair of alternate interior angles.
∴ AD || BC
Similarly, AB || DC
∴ ABCD is a parallelogram.
∴ Parallelogram having all its sides equal is a rhombus.
∴ ABCD is a rhombus.
Now, in ∆ABC and ∆BAD, we have
AC = BD [Given]
BC = AD [Proved]
AB = BA [Common]
∴ ∆ABC ≅ ∆BAD [By SSS congruency]
∴ ∠ABC = ∠BAD [By C.P.C.T.] ……(5)
Since, AD || BC and AB is a transversal.
∴∠ABC + ∠BAD = 180° .. .(6) [ Co – interior angles]
⇒ ∠ABC = ∠BAD = 90° [By(5) & (6)]
So, rhombus ABCD is having one angle equal to 90°.
Thus, ABCD is a square.

LAST UPDATED : 30/09/2021 | 06:30AM

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      DPP - 01102021021BHPAT : Daily Practice Problems - PHYSICS - 01/10/2021

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Q1. A car travelling initially at 7 ms–1 accelerates at the rate of 8.0 ms–2 for an interval of 2.0 s. What is its velocity at the end of the 2 s?

Q2. A car travelling in a straight line has a velocity of 5.0 ms–1 at some instant. After 4.0 s, its velocity is 8.0 ms–1. What is its average acceleration in this time interval?

Q3. Does the direction of velocity decide the direction of acceleration?

Q4. Establish the relation between acceleration and distance travelled by the body

Q5. Explain whether or not the following particles have acceleration:
(i) a particle moving in a straight line with constant speed, and
(ii) a particle moving on a curve with constant speed.

Q6. Why does a sprinter keep running for sometime even after crossing the finish line?

Q7. Why is it advised to tie the luggage with a rope on the roof of busses?

Q8. Why do the dust particles from the hanging blanket fall off when it is beaten with a stick?

Q9. State Newton’s first law of motion. Why do the passengers standing in a stationary bus fall in the backward direction when the bus begins to move suddenly.

Q10. Define momentum. How the rate of change of momentum is related to force?

Q11. If a body of mass 10 kg moves with a velocity of 7 ms–1, then what is the momentum of the body?

Q12. If a force of 50 N acts on a body of mass 10 kg then what is the acceleration produced in the body?