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 Physics Questions

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Q:

Find the work done (in J) when a charge of 20 C moves across a potential difference of 4 V.

 

 

A) 5 B) 40
C) 80 D) 10
 
Answer & Explanation Answer: C) 80

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2 20410
Q:

1 Joule is Equal to

A) 10^3 ergs B) 10^6 ergs
C) 10^7 ergs D) 10^5 ergs
 
Answer & Explanation Answer: C) 10^7 ergs

Explanation:

1 Joule = 107 ergs = 0.000239 Kilo Calories.

      • Joule is the Unit of Energy.

Joule is equal to Energy transferred to an object when a force of One Newton acts on that object in the direction of its motion through a distance of one metre.(1 N-m)

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52 20162
Q:

The ratio of the total distance travelled by a body to the total time taken by it is its __________________.

 

A) instantaneous velocity B) linear velocity
C) average speed D) acceleration
 
Answer & Explanation Answer: C) average speed

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2 20133
Q:

How many millimeters make ten kilometers?

 

A) 1010 B) 109
C) 108 D) 107
 
Answer & Explanation Answer: D) 107

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0 20051
Q:

Find the potential energy gained by a body of mass 60 kg, if it is raised by 12 m. (use g = 10 m/s2)

 

A) 7200 B) 50
C) 3600 D) 25
 
Answer & Explanation Answer: A) 7200

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0 19443
Q:

Seismic waves are recorded by an instrument called the ________________.

 

A) seismograph B) odograph
C) isograph D) lithograph
 
Answer & Explanation Answer: A) seismograph

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0 19094
Q:

If a sound travels from air to water, the quantity that remain unchanged is

A) velocity B) frequency
C) wavelength D) amplitude
 
Answer & Explanation Answer: B) frequency

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139 18885
Q:

Which of the following is based on the principle of nuclear fusion?

 

A) Atomic bomb B) Hydrogen bomb
C) Both Atomic and Hydrogen bomb D) No option is correct
 
Answer & Explanation Answer: B) Hydrogen bomb

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