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Q:

The velocity of light in vacuum is

A) 3 x 108 m/s B) 2 x 108 m/s
C) 3 x 107 m/s D) 3 x 106 m/s
 
Answer & Explanation Answer: A) 3 x 108 m/s

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Q:

Which of the following is a characteristic of an exothermic reaction?

A) Release of heat B) Absorption of heat
C) Doesn't involve any change in temperature D) None of the option is correct
 
Answer & Explanation Answer: A) Release of heat

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Q:

A conductor having some appreciable resistance is called a

A) Resistor B) Insulator
C) Conductor D) Semi-conductor
 
Answer & Explanation Answer: A) Resistor

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Q:

___ is a unit of length, roughly the distance from Earth to the Sun.

A) Light years B) Astronomical unit
C) Kelvin D) Joule
 
Answer & Explanation Answer: B) Astronomical unit

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Q:

The SI unit of momentum is _____________.

A) kilogram-metre per second B) kilogram-metre per second
C) kilogram-metre-second D) kilogram-metre-second squared
 
Answer & Explanation Answer: A) kilogram-metre per second

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Q:

If the acceleration due to gravity on the surface of earth is g, then the acceleration due to gravity on the surface of a planet whose mass is half of that of earth and radius is same as that of earth is _________________.

 

A) g/2 B) 4g
C) 2g   D) g/4
 
Answer & Explanation Answer: A) g/2

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Q:

If a current of 1.5 A is maintained in a resistor of 10 ohm, then the energy dissipated in the resistor in 1 minute will be 

 

 

A) 15 W  B) 22.5 W 
C) 135 W  D) 1350 W
 
Answer & Explanation Answer: D) 1350 W

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Q:

The force of friction between two surfaces will increase if:

A) a layer of lubricant is kept between the two surfaces B) the two surfaces are pressed harder
C) air gap is created between the two surfaces D) irregularities on both the surfaces are removed
 
Answer & Explanation Answer: B) the two surfaces are pressed harder

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