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Q:

What is the power rating (in W) of a bulb if a current of 0.3 A passes through on application of 240 V of potential difference across its terminals?

A) 800 B) 36
C) 400 D) 72
 
Answer & Explanation Answer: D) 72

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Q:

Which phenomena shows the particle nature of light?

A) Diffraction B) Interference
C) Photoelectric effect D) Polarisation
 
Answer & Explanation Answer: C) Photoelectric effect

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Q:

Which bulb operates on lowest power?

A) Night bulb B) Torch bulb
C) Neon bulb D) GLS bulb
 
Answer & Explanation Answer: B) Torch bulb

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Q:

Kinetic energy depends on

A) the velocity or speed of the moving body. B) the mass of the moving body
C) the pressure of the moving body D) both mass and velocity of the moving body
 
Answer & Explanation Answer: D) both mass and velocity of the moving body

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Q:

Which of the following is not a vector quantity?

A) Acceleration B) Electric current
C) Force D) Velocity
 
Answer & Explanation Answer: B) Electric current

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Q:

The apparent weight of a person in a lift which is moving down with uniform acceleration is _______.

A) greater than the weight when the person is stationary B) twice the weight when the person is stationary
C) less than the weight when the person is stationary D) same as the weight when the person is stationary
 
Answer & Explanation Answer: C) less than the weight when the person is stationary

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Q:

Who proposed Continental drift theory?

A) Alfred Wegener B) Alfred Worwick
C) Alfred Hanks D) Alfred Mane
 
Answer & Explanation Answer: A) Alfred Wegener

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Q:

To convert temperature from Celcius to Kelvin scale, you must ___ the given temperature.

A) subtract 273 B) multiply 273
C) add 273 D) divide by 273
 
Answer & Explanation Answer: C) add 273

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