Physics Questions

Q:

The group of solar cells joined together in a definite pattern is called a

A) Battery B) Solar Heater
C) Solar cooker D) Solar cell panel
 
Answer & Explanation Answer: D) Solar cell panel

Explanation:
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Q:

Which waves cannot be transmitted through vacuum?

A) Electromagnetic B) Light
C) Sound D) Heat
 
Answer & Explanation Answer: C) Sound

Explanation:

Sound waves cannot be transmitted through vacuum. 

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Q:

Find the current (in A) when a charge of 1200C flows in 6 seconds.

A) 7200 B) 200
C) 100 D) 3600
 
Answer & Explanation Answer: B) 200

Explanation:
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Q:

The substances which reduce friction are called _________.

A) irregularities B) lubricants
C) adhesives D) viscous
 
Answer & Explanation Answer: B) lubricants

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Q:

The swift movement of the falling water droplets along with the rising air create lightning and sound. It is this event that we call a ________________.

A) thunderstorm B) hail
C) twister D) cloudburst
 
Answer & Explanation Answer: A) thunderstorm

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Q:

The mechanism of material removal in EDM process is

A) Erosion and Cavitations B) Cavitations and Evaporation
C) Melting and Evaporation D) Melting and Corrosion
 
Answer & Explanation Answer: C) Melting and Evaporation

Explanation:

Electrical discharge machining (EDM), also known as spark machining, spark eroding, burning, die sinking, wire burning or wire erosion, is a manufacturing process whereby a desired shape is obtained by using electrical discharges.

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Q:

Time period of a seconds pendulum is

A) 2 seconds B) 4 seconds
C) 1 seconds D) 0 seconds
 
Answer & Explanation Answer: A) 2 seconds

Explanation:

A seconds pendulum is a pendulum whose period is precisely two seconds i.e, one second for a swing in one direction and one second for the return swing.

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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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