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 Physics Questions

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Q:

Mirage is due to

A) Magnetic disturbances in the atmosphere B) Equal heating of different parts of the atmosphere
C) Unequal heating of different parts of the atmosphere D) Depletion of ozone layer in the atmosphere
 
Answer & Explanation Answer: C) Unequal heating of different parts of the atmosphere

Explanation:

Mirage_is_due_to1553078535.jpg image

A Mirage is a naturally occurring optical phenomenon due to unequal heating of different parts of the atmosphere in which light rays bend to produce a displaced image of distant objects or the sky.

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Q:

Magnetic field lines about a current-carrying wire

A) circle the wire in closed loops B) extend radially from the wire
C) both of these D) None of the above
 
Answer & Explanation Answer: A) circle the wire in closed loops

Explanation:

Electric current produces a magnetic field. This magnetic field can be visualized as a pattern of circular field lines surrounding a wire.

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Q:

When a bullet is fired from a gun 

A) the gun moves forward B) the gun jumps up
C) the gun does not move D) the gun recoils with the same momentum as the bullet
 
Answer & Explanation Answer: D) the gun recoils with the same momentum as the bullet

Explanation:

Newton's III law involved

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Q:

Ampere second could be the unit of

A) Power B) Energy
C) Conductance D) Charge
 
Answer & Explanation Answer: C) Conductance

Explanation:
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Q:

Water is more dense than cooking oil.

A) TRUE B) FALSE
Answer & Explanation Answer: A) TRUE

Explanation:

Yes, the given statement that water is more dense than cooking oil is TRUE as water more denser than oil it is sinked when it is poured in oil.

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Q:

What measures Air pressure?

A) Barkometer B) Bolometer
C) Spectrometer D) Barometer
 
Answer & Explanation Answer: D) Barometer

Explanation:

Air Pressure can be defined as the pressure of air in the earth's atmosphere. It reaches a maximum of about 100,000 Pa near sea level and decreases as altitude increases.

The barometer is an instrument which is used for measuring Air pressure.

 

Physics instruments and their uses:

 

Barkometer  - - - Tanning liquors used in tanning leather

Bolometer  - - - Electromagnetic radiation

Spectrometer - - -  Properties of light.

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Q:

Which elements are malleable and good conductors of electricity?

A) tin and silver B) iodine and silver
C) tin and xenon D) iodine and xenon
 
Answer & Explanation Answer: A) tin and silver

Explanation:

Tin and Silver are malleable and good conductors of electricity. The other combinations have a non metal in them which are bad conductors.

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Q:

Electromagnetic waves are transverse in nature is evident by

A) Reflection B) Polarisation
C) interference D) Diffraction
 
Answer & Explanation Answer: B) Polarisation

Explanation:
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