Physics MCQs GK objective Questions GK test Set – 34

Question 1.

The size of gear is usually specified by

A. Pitch circle diameter
B.Diametral pitch
C. Pressure angle
D. Circular pitch

Ans: A. Pitch circle diameter

Question 2.

Which of these is true of all simple machines?

A. These make work easier
B. Work input > work output
C. Both A & B
D. None of the above

Ans: C. Both A & B

Question 3.

Optical fibre works on which of the following principle of light?

A. Reflection
B. Refraction
C. Diffraction
D. Total internal reflection

Ans: D. Total internal reflection

Question 4.

Which of the following is a compound machine?

A. Screw
B. Knife
C. Bicycle
D. Ramp

Ans: C. Bicycle

Question 5.

Which of these is not a simple machine?

A. A pair of scissors
B. A lever
C. A ramp
D. The pulley

Ans: A. A pair of scissors

Question 6.

Which colour of light shows maximum deviation when passed through a prism ?

A. White
B. Red
C. Violet
D. Green

Ans: C. Violet

Question 7.

Which of the following is an example for cantilever beam?

A. Diving board
B. Bridge
C. See-saw
D. Common balance

Ans: B. Bridge

Question 8.

The plastic material commonly used for making gear wheels is

A. Polyesters
B. Nylons
D. Polystyrene

Ans: B. Nylons

Question 9.

The sparkling of a diamond is due to

A. Total internal reflection of light
B. Interference of light
C. Polarisation of light
D. Refraction of light

Ans: A. Total internal reflection of light

Question 10.

A machine powered by rotating blades is a

A. Fumerole
B. Turbines
C. Solar panel
D. None of the above

Ans: B. Turbines

Question 11.

The reason for a swimming pool to appear less deep than the actual depth is

A. Refraction
B. Light scattering
C. Reflection
D. Interference

Ans: A. Refraction

Question 12.

Stars appear twinkling because of ……… of light.

A. Reflection
B. Scattering
C. Emission

Ans: B. Scattering

Question 13.

Second and third class levers are differentiated by

A. The location of the load
B. The location of the fulcrum
C. The presence of multiple loads
D. The type of fulcrum present

Ans: A. The location of the load

Question 14.

When light passes from one medium to another, this phenomenon of change in its direction is called __

A. Refraction
B. Diffraction
C. Propagation
D. No option is correct

Ans: A. Refraction

Question 15.

Stars in the sky appear to twinkle due to

A. A series of refractions
B. A series of reflections
C. A surface tension phenomenon
D. Multiple diminishing brightness

Ans: A. A series of refractions

Physics GK MCQs all set

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