10th Science (Physics) Revision Test 1 Model Question Paper

Kickstart your exam preparation with our comprehensive 10th Science Physics Revision Test 1 Model Question Paper. Designed by subject experts to mirror the latest exam pattern, this paper covers the vital initial chapters of your Physics syllabus—focusing heavily on laws of motion, optics, and thermodynamics. Practising this model paper under timed conditions will help you master complex numerical problems, perfect your ray diagrams, and identify areas that need extra focus before your official revision tests.

10th SCIENCE (Physics)

Revision Test: 1 • Std: 10

Nov: 2019 Time: 1.30 Hrs. Marks: 50

I. Choose the correct answer. 6 × 1 = 6

1. If the Earth shrinks to 50% of its real radius its mass remaining the same, the weight of a body on the Earth will
a) decrease by 50% b) increase by 50%
c) decrease by 25% d) increase by 300%

2. Power of a lens is -4D, then its focal length is
a) 4m b) -40m c) -0.25 m d) -2.5 m

3. If a substance is heated or cooled, the change in mass of that substance is
a) positive b) negative c) zero d) none of the above

4. Kilowatt hour is the unit of
a) resistivity b) conductivity c) electrical energy d) electrical power

5. The velocity of sound in air at a particular temperature is 330 m s^-1. What will be its value when temperature is doubled and the pressure is halved?
a) 330 m s^-1 b) 165 m s^-1
c) 330 × √2 m s^-1 d) 320 / √2 m s^-1

6. Artificial radioactivity was discovered by
a. Becquerel b. Irene Curie c. Roentgen d. Neils Bohr

II. Answer any 5 questions 5 × 2 = 10

7. State Newton's second law

8. Why does the sky appear in blue colour?

9. True or False, if false explain why?
i) For a given heat in liquid, the apparent expansion is more than that of real expansion
ii) Thermal energy always flows from a system at higher temperature to a system at lower temperature

10.
Assertion: LED bulbs are far better than incandescent bulbs.
Reason: LED bulbs consume less power than incandescent bulbs.
Mark the correct choice as:
a. If both the assertion and the reason are true and the reason is the correct explanation of the assertion. b. If both the assertion and the reason are true but the reason is not the correct explanation of the assertion. c. Assertion is true, but the reason is false. d. Assertion is false, but the reason is true.

11. Match the following:

a. Co - 60	Age of fossil
b. I - 131	Function of Heart
c. Na - 24	Leukemia
d. C - 14	Thyroid disease

12. Name three animals, which can hear ultrasonic vibrations

13. Why is tungsten metal used in bulbs, but not in fuse wires?

14.
i) _______ is used to change the speed of car.
ii) A man of mass 100 kg has a weight of _______ at the surface of the Earth.

III. Answer any 5 questions (Q No 16 is compulsory) 5 × 4 = 20

15. Give the applications of universal law gravitation.

16. A torch bulb is rated at 3 V and 600 mA. Calculate it's:
a) power
b) resistance
c) energy consumed if it is used for 4 hour

17.
a) What do you understand by the term 'ultrasonic vibration'?
b) State three uses of ultrasonic vibrations.
c) Name three animals which can hear ultrasonic vibrations.

18.
i. 'X-rays should not be taken often'. Give the reason.
ii. Cell phone towers should be placed far away from the residential area — why?

19. Differentiate mass and weight.

20. Draw a ray diagram to show the image formed by a convex lens when the object is placed between F and 2F.

21. Distinguish between ideal gas and real gas.

22.
a) What is meant by electric current?
b) Name and define its unit.
c) Which instrument is used to measure the electric current? How should it be connected in a circuit?

IV. Answer any two 2 × 7 = 14

23. Explain the construction and working of a 'Compound Microscope'.

(OR)

24. What is an echo?
a) State two conditions necessary for hearing an echo.
b) What are the medical applications of echo?
c) How can you calculate the speed of sound using echo?

25. Derive the ideal gas equation.

(OR)

26. Compare the properties of alpha, beta and gamma radiations.