Physics Questions

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:

The mass per unit volume is called

A) Force B) Work
C) Density D) Pressure
 
Answer & Explanation Answer: C) Density

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Q:

If the resistance of a conductor is doubled, the current gets halved. This is because

A) I = V - R B) I = V/R
C) I = Rn/V D) I = VR
 
Answer & Explanation Answer: B) I = V/R

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Q:

Find the potential energy gained by a body of mass 25 kg, if it is raised by 5 m. (use g = 10 m/s2)

A) 1250 B) 50
C) 625 D) 25
 
Answer & Explanation Answer: A) 1250

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Q:

What is the direction of torque?

A) Perpendicular to the direction of applied force B) Same as the direction of applied force
C) Opposite to the direction of applied force D) Parallel to the radius
 
Answer & Explanation Answer: A) Perpendicular to the direction of applied force

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Q:

The instrument used for measuring air pressure is called .....

A) Anemometer B) Barometer
C) Hygrometer D) Thermometer
 
Answer & Explanation Answer: B) Barometer

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Q:

A curved mirror where the reflecting surface is curved inwards is called a

A) Concave mirror B) Plano-convex mirror
C) Plane mirror D) Convex mirror
 
Answer & Explanation Answer: A) Concave mirror

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Q:

A compressed spring possesses more energy than a spring of normal length because the compressed spring has

A) chemical energy B) potential energy
C) heat energy D) kinetic energy
 
Answer & Explanation Answer: B) potential energy

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