**131. A body falling freely under gravity travels half its path in the last one second. The total**

**time of fall is approximately.?**

A. 4.4s

**B. 3.4s**

C. 2.4s

C. 2.0s

**132. An astronomical telescope has an objective of focal length 80 cm and gives 8 × angular**

**magnification. The focal length of the eye piece is.?**

A. 6.0 cm

B. 8.0 cm

**C. 10.0 cm**

D. 12.0 cm

**133. The points of units angular magnification in a lens assembly are.?**

**A. Nodal Points**

B. Principal
Points

C. Focal
Points

D. Contin
Points

**134. In He0Ne laser the most favorable ratio of Helium to Neon for satisfactory laser action is.?**

**A. 7:1**

B. 1:4

C. 4:11

D. 1:7

**135. The electric field at 20 cm from the centre of a uniformly charged dielectric sphere of**

**radius 10 cm is E. Then at a distance 5 cm from the centre it will be.?**

A. 16 E

B. 4 E

C. 2 E

**D. Zero**

**136. Two pieces of wire of the same material have their lengths in the ratio of 1:2 and**

**diameters in the ratio of 2:1. If they are stretched by the equal force, elongation will be int he ration of.?**

A. 1:2

**B. 1:8**

C. 2:1

D. 8:1

**137. The pressure at the bottom of a tank of liquid is not proportional to.?**

A. The density of the liquid

B. The height of the liquid

C. The acceleration

**D. The area of the liquid surface**

**138. A body in equilibrium may not have.?**

**A. Acceleration**

B. Momentum

C. Velocity

D. Kinetic
energy

**139. If C is proportional to D, then.?**

A. The product
CD is constant

B. The ration
C/D is constant

C. C is
smaller than D

**D. C is larger then D**

**140. When a body undergoes an acceleration.?**

A. Its
velocity increases

B. Its speed
increases

C. It falls
toward the earth

**D. A force acts upon it**

*Physics MCQs*Previsou Page [ 121 To 130 ]

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