10th Physics One Mark Test Question Paper

Test your conceptual speed and dominate the objective section with our 10th Physics One Marks Test Question Paper. This targeted practice paper is designed to evaluate your understanding of the first six crucial chapters—ranging from the core mechanics of Laws of Motion and Optics to the intricate principles of Electricity and Acoustics. Featuring a mixture of textbook evaluation questions, essential unit conversions, and application-based interior bits, this test ensures you thoroughly master the foundational half of your Physics syllabus for a perfect score.

STD: X MARKS: 30

Time: 5 Min.

ONEMARK TEST - I

Lesson: 1-6

PHYSICS

Choose the correct answer. 30 × 1 = 30

1. Inertia of a body depends on
a) weight of the object b) acceleration due to gravity of the planet
c) mass of the object d) Both a & b

2. The unit of 'g' is m s^-2. It can be also expressed as
a) cm s^-1 b) N kg^-1 c) N m² kg^-1 d) cm² s^-2

3. One kilogram force equals to
a) 9.8 dyne b) 9.8 × 10⁴ N c) 98 × 10⁴ dyne d) 980 dyne

4. 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%

5. Plotting a graph for momentum on the Y-axis and time on X-axis. slope of momentum-time graph gives
a) Impulsive force b) Acceleration c) Force d) Rate of force

6. In the nuclear reaction ₆X¹² →^{α decay} _ZY^A, the value of A & Z
a. 8, 6 b. 8, 4 c. 4, 8 d. cannot be determined with the given data

7. Kamini reactor is located at
a. Kalpakkam b. Koodankulam c. Mumbai d. Rajasthan

8. _______ isotope is used for the treatment of cancer
a. Radio Iodine b. Radio Cobalt c. Radio Carbon d. Radio Nickel

9. In which of the following, no change in mass number of the daughter nuclei takes place
i) α decay ii) β decay iii) γ decay iv) neutron decay
a. (i) is correct b. (ii) and (iii) are correct c. (i) & (iv) are correct d. (ii) & (iv) are correct

10. Man-made radioactivity is also known as
a. Induced radioactivity b. Spontaneous radioactivity c. Artificial radioactivity d. a & c

11. When a sound wave travels through air, the air particles:
(a) vibrate along the direction of the wave motion. (b) vibrate but not in any fixed direction. (c) vibrate perpendicular to the direction of the wave motion. (d) do not vibrate.

12. The velocity of sound in air at a particular temperature is 330 m s^-1. What will be its value when the 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

13. The sound waves are reflected from an obstacle into the same medium from which they were incident. Which of the following changes?
(a) speed (b) frequency (c) wavelength (d) none of these

14. If a sound wave travels with a frequency of 1.25 × 10⁴ Hz at 344 m s^-1, the wavelength will be:
(a) 27.52 m (b) 275.2 m (c) 0.02752 m (d) 2.752 m

15. If a substance is heated or cooled, the linear expansion occurs along the axis of
(a) X or -X (b) Y or -Y (c) both (a) and (b) (d) either (a) or (b).

16. The value of universal gas constant:
(a) 3.81 J mol^-1 K^-1 (b) 8.03 J mol^-1 K^-1 (c) 1.38 J mol^-1 K^-1 (d) 8.31 J mol^-1 K^-1

17. In the given diagram, the possible direction of heat energy transformation:

A303 K B304 K C305 K

(a) A ← B, A ← C, B ← C (b) A → B, A → C, B → C
(c) A → B, A ← C, B → C (d) A ← B, A → C, B ← C

18. If V_B, V_G, V_R be the velocity of blue, green and red light respectively in a glass prism, then which of the following statement gives the correct relation?
a) V_B = V_G = V_R b) V_B > V_G > V_R c) V_B < V_G < V_R d) V_B < V_G > V_R

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

20. A small bulb is placed at the principal focus of a convex lens. When the bulb is switched on, the lens will produce
a) a convergent beam of light b) a divergent beam of light
c) a parallel beam of light d) a coloured beam of light

21. Where should an object be placed so that a real and inverted image of same size is obtained by a convex lens
a) f b) 2f c) infinity d) between f and 2f

22. The refractive index of four substances A, B, C and D are 1.31, 1.43, 1.33, 2.4 respectively. The speed of light is maximum in
a) A b) B c) C d) D

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

24. Which of the following is correct?
a) Rate of change of charge is electrical power. b) Rate of change of charge is current. c) Rate of change of energy is current. d) Rate of change of current is charge.

25. The velocity of sound in the atmosphere of a planet is 500 m s^-1. The minimum distance between the sources of sound and the obstacle to hearing the echo should be
(a) 17 m (b) 20 m (c) 25 m (d) 50 m.

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

27. _______ aprons are used to protect us from gamma radiations
a. Lead oxide b. Iron c. Lead d. Aluminium

28. SI unit of resistance is
a) mho b) joule c) ohm d) ohm meter

29. 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

30. Which of the following lens would you prefer to use while reading small letters found in a dictionary?
a) A convex lens of focal length 5 cm b) A concave lens of focal length 5 cm c) A convex lens of focal length 10 cm d) A concave lens of focal length 10 cm