Question

1. The property of a body to restore its original size and shape as the deforming force ceases to act is called
(a) plasticity (b) elasticity
(c) strain (d) tensile strength

2. Neutral axis of a beam always coincides with a.

(a) Axis passing through bottom of beam b.
(b) Axis passing through height h/2 from bottom a.
(c) Axis passing through height h/3 from bottom
(d) Axis passing through centroid

3. The motion of a torsional pendulum is
(a) periodic (b) oscillatory (c) angular simple harmonic (d) all these

4. The value of Newton’s gravitational constant is

(a) G = 6.673×10-11 N m2 kg-2 (b) G = 6.673×10-10 N m2 kg-2 (c) g = 9.8 m/s2 (d) none of these

5. What is the increase in the potential energy of the body with mass m if the body is taken at the height h which is equal to the radius of the earth? (
a) mgR (b) 2mgR
(c) 12mgR (d) 14mgR

6. Force of gravity is directly proportional to
(a) mass (b) time
(c) weight (d) distance

7. Raindrops are spherical in shape because of ……………….
(a) Capillary (b) Surface tension
(c) Acceleration due to gravity (d) Downward motion

8. At the critical temperature, the surface tension of the liquid
(a) is zero (b) is infinity
(c) is 100 (d) cannot be determined

9. Surface tension of liquid is independent of the
(a) Temperature of the liquid (b) Nature of the liquid (c) Impurities present in the liquid
(d) Area of the liquid surface

10. SI unit of viscosity is
(a) Newton (b) Newton/meter
(c) Candela (d) Poiseiulle

11. What happens to the viscosity of liquid with the increase in temperature?
(a) decreases (b) increases
(c) may increase or decrease (d) no changes

12. Which of these fluids has the highest viscosity?
(a) Air (b) Water
(c) Honey (d) Blood

13. Diffusion can occur in …………………….. materials.
(a) Solid (b) Liquid
(c) Gaseous (d) All of these
14. Diffusion is the result of:
(a) Random motion of particles (b) Concentration gradient (c) Kinetic energy of particles (d) All of the mentioned

15. Diffusion of water across a semi-permeable membrane from an area of high concentration to an area of low concentration
(a) Osmosis (b) Diffusion
(c) hypotonic (d) hypertonic​

Answer 1

Explanation:

1. b

2.d

3. c

4.c

5.a

6.a

7.b

8.a

9.c

10.d

11.a

12.c

13.d

14.d

15.a

Answer 2

Answer:

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Explanation:

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