Physics Questions

Q:

The basic Speed Law means

Answer

The Basic Speed Law states that you must never drive faster than is safe for present conditions, regardless of the posted speed limit.


For example, if you are driving 60 kmph in 45 kmph zone, you are not in safe driving and you just not following the speed law.

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Q:

A body of mass 18 kg is moving with a velocity of 6 m/s, find its momentum.

A) 108 B) 4.5
C) 54 D) 9
 
Answer & Explanation Answer: A) 108

Explanation:
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Q:

Find the resistance (in mega ohm) of a wire of length 8 m, cross sectional area 2 sq.cm and made of a material of resistivity 120 ohm m.

A) 1920 B) 4.8
C) 2.4 D) 960
 
Answer & Explanation Answer: B) 4.8

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Q:

The increasing order of the refractive index of certain materials is (left to right) .......

A) Rocksalt, Benzene, Kerosene, Ice B) Rock Salt, Ice, Benzene, Kerosene
C) Ice, Kerosene, Benzene, Rock Salt D) Kerosene, Ice, Benzene, Rock Salt
 
Answer & Explanation Answer: C) Ice, Kerosene, Benzene, Rock Salt

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Q:

During _____________ motion of an object along a straight line, the velocity remains constant with time.

A) linear B) translational
C) uniform D) equilibrium
 
Answer & Explanation Answer: C) uniform

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Q:

Find the power of a convex lens if the image formed is at a distance of 10 cm from the lens when the object is placed on the other side of the lens at 40 cm from the optical centre?

A) 12.5 diopters B) 7.5 diopters
C) -12.5 diopters D) -7.5 diopters
 
Answer & Explanation Answer: A) 12.5 diopters

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Q:

The time period of a sound wave is 0.01 seconds. Find its frequency (in Hz).

A) 100 B) 10
C) 50 D) 20
 
Answer & Explanation Answer: A) 100

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Q:

Sound is a form of ____________ which produces a sensation of hearing in our ears.

A) power B) energy
C) force D) momentum
 
Answer & Explanation Answer: B) energy

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