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
C.Bakelit
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
D.Absorption
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
- Physics MCQs Set-1
- Physics MCQs Set-2
- Physics MCQs Set-3
- Physics MCQs Set-4
- Physics MCQs Set-5
- Physics MCQs Set-6
- Physics MCQs Set-7
- Physics MCQs Set-8
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- Physics MCQs Set-49
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- Physics MCQs Set-76
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