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 Physics Questions

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Q:

The SI unit of weight is a

A) Kg B) Newton
C) Gram D) Dyne
 
Answer & Explanation Answer: B) Newton

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Q:

Multiplication of equivalent weight and valency of an element is equal to ______.

A) Density B) Relative temperature
C) Atomic weight D) Atomicity
 
Answer & Explanation Answer: C) Atomic weight

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Q:

Energy possessed by an object by its position or configuration is called

A) Kinetic energy B) Nuclear energy
C) Potential energy D) Electrical energy
 
Answer & Explanation Answer: C) Potential energy

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Q:

Find the resistance (in mega Ω) of a wire of length 10 m, cross sectional area 1 cm2 and made of a material of resistivity 100 Ωm.

 

A) 1000   B) 20  
C)  500   D) 10
 
Answer & Explanation Answer: D) 10

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Q:

According to Ohm's law, if current (I) increase and potential difference (V) remains constant, then

A) resistance unchanged B) resistance decreases
C) potential difference decreases D) resistance increases
 
Answer & Explanation Answer: B) resistance decreases

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Q:

Which of the following coloured light has the lowest frequency?

A) Green B) Blue
C) Red D) Violet
 
Answer & Explanation Answer: C) Red

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Q:

Blocking in experimental design is useful because it

A) keeps the experimenter from knowing which subjects are in the treatment group. B) prevents response bias from entering into the experiment.
C) gives the quarterback enough time to throw the ball. D) controls for multiple variables in an experiment.
 
Answer & Explanation Answer: D) controls for multiple variables in an experiment.

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Q:

An object of 1.2 cm height is placed 30 cm before a concave mirror of focal length of 20 cm toget a real image at a distance of 60 cm from the mirror. What is the height of the image formed?

A) -3.6 cm B) -2.4 cm
C) 1.2 cm D) 2.4 cm
 
Answer & Explanation Answer: B) -2.4 cm

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