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Q.

What is the name of the device which is used to draw the magnetic field lines?


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a

Compass needle

b

A solenoid

c

Electric generator

d

none of these  

answer is A.

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Detailed Solution

The device which is used to draw the magnetic field lines is called a compass needle.
Magnetic field lines are drawn using a compass needle taken near a magnet, and the deflection is drawn around the magnet, representing the magnetic field lines.
 
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