Physics Questions

Q:

A lemon kept in water in a glass tumbler appears to be bigger than its actual size when viewed from the sides. This is because of

A) reflection of light B) internal reflection of light
C) refraction of light D) diffraction of light
 
Answer & Explanation Answer: C) refraction of light

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Q:

What is the unit of calorific value?

A) kN/kg B) kJ/kg
C) kW/sec D) kCal/sec
 
Answer & Explanation Answer: B) kJ/kg

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Q:

Instrument for measuring low temperatures is called

A) Diagometer B) Cryometer
C) Chromatoptometer D) Cymometer
 
Answer & Explanation Answer: D) Cymometer

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Q:

Which one among the following components can not be developed within an "integrated circuit"?

A) Diode B) Triode
C) Transformer D) Transistor
 
Answer & Explanation Answer: C) Transformer

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Q:

Warm air is ______.

A) heavier than cold air hence warm air rises up B) lighter than cold air hence warm air moves down
C) lighter than cold air hence warm air rises up D) heavier than cold air hence warm air moves down
 
Answer & Explanation Answer: C) lighter than cold air hence warm air rises up

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Q:

Through which does light travel best?

A) water B) air
C) vacuum D) none
 
Answer & Explanation Answer: C) vacuum

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Q:

Which of the following is NOT an application of Fiber optics?

A) Power Generation B) Computer Networking
C) Sensors D) Power Transmission
 
Answer & Explanation Answer: A) Power Generation

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Q:

In an optical fibre the signal is transmitted

A) in a straight line path B) In a curved path
C) due to total internal reflection D) Due to refraction
 
Answer & Explanation Answer: D) Due to refraction

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