Objective General Knowledge

Q. When a moving bus suddenly applies brakes, the passengers sitting in it fall in the forward direction. This can be explained by:
1 the theory of relativity
2 Newton's first law.
3 Newton's second law.
4 Newton's third law.
Ans: 2
Q. The material used for electric fuse is an alloy of tin and lead. This alloy should have:
1 high specific resistance and low melting point.
2 low specific resistance and high melting point.
3 low specific resistance and low melting point.
4 high specific resistance resistance and high melting point
Ans: 1
Q. Suppose you are standing 1 m in front of a plane mirror. What should be the minimum vertical size of the mirror so that you can see your full image in it?
1 0.50 m
2 2 m
3 half of your height
4 twice your height
Ans: 3
Q. Light travels slower in glass than in air because:
1 refractive index of air is less than that of glass.
2 refractive index of air is greater than that of glass.
3 density of glass is less than that of air
4 density of glass is greater than that of air.
Ans: 1
Q. The lines of force of a uniform magnetic field:
1 must be convergent
2 must be divergent
3 must be parallel to each other
4 intersect
Ans: 3
Q. A Jet engine works on the principle of Conservation of:
1 linear momentum
2 angular momentum
3 energy
4 mass
Ans: 1
Q. The surface temperature of the Sun is nearly:
1 6000 K.
2 2000 K.
3 4000 K.
4 8000 K.
Ans: 1
Q. If the electrical resistance of a typical substance suddenly drops to zero, then the substance is called:
1 super conductor
2 semiconductor
3 conductor
4 insulator
Ans: 1
Q. A spherical air bubble is embedded in a piece of glass. For a ray of light passing through the bubble, it behaves like a :
1 converging lens
2 diverging lens
3 piano-converging lens
4 piano-diverging lens
Ans: 2
Q. 'The stars seem to be higher on the sky than they actually are'. This can be explained by:
1 atmospheric refraction
2 dispersion of light
3 total internal reflection
4 diffraction of light
Ans: 1
 
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