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 Physics Questions

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Q:

When a barometer is rising air pressure is

A) increasing B) decreasing
C) constant D) zero
 
Answer & Explanation Answer: A) increasing

Explanation:

The device which is used to measure air pressure is called as barometer. If the barometer reading is rising, it indicates that the air pressure is increasing and if the reading is falling the air pressure is decreaing.

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Q:

After removing two electrons from helium atom it become?

A) UV rays B) Alpha particle
C) Gama particle D) X rays
 
Answer & Explanation Answer: B) Alpha particle

Explanation:
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Q:

In order to make an electromagnet you need a

A) Dry cell batteries B) Thin coated copper wire
C) Iron nail D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

To create a simple electromagnet, you'll need a source of electricity, a conductor, and metal. Wrap insulated copper wire tightly around an iron screw or nail before connecting the wire to a battery, and watch as your new electromagnet picks up small metal objects.

 

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Q:

Which of the following pair is INCORRECT?
I. Parsec - Distance
II. Barrel - Liquid
III. Light year - Time

A) Only III B) Only I and III
C) Only II D) All are correct
 
Answer & Explanation Answer: A) Only III

Explanation:
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Q:

Instrument for measuring light intensity is called

A) Lucimeter B) Cryometer
C) Cyanometer D) Barometer
 
Answer & Explanation Answer: A) Lucimeter

Explanation:
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Q:

One billionth of a second is called

A) microsecond B) picoseconds
C) millisecond D) nanosecond
 
Answer & Explanation Answer: D) nanosecond

Explanation:

A nanosecond (ns) is an SI unit of time equal to one thousand-millionth of a second or one billionth of a second.

 

  • That is, 1/1,000,000,000 of a second, or 10^−9 seconds.
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Q:

What is the SI unit of heat energy?

A) Joule B) Newton
C) Calorie D) Kelvin
 
Answer & Explanation Answer: A) Joule

Explanation:
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Q:

An electric fuse is based on

A) the chemical effect of the current B) the magnetic effect of the current
C) the heating effect of the current D) All of the above
 
Answer & Explanation Answer: C) the heating effect of the current

Explanation:

An electric fuse is based on the heating effect of the current.

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