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Q.

According to the right-hand thumb rule, the fingers curled around the conductor indicate the direction of:

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a

Magnetic field

b

Deflection of the needle

c

Current

d

Magnetic force 

answer is A.

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Detailed Solution

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According to the right-hand thumb rule, the fingers curled around the conductor indicate the direction of the magnetic field. 

Right-hand thumb rule:

If we hold the current-carrying conductor in the right hand with the thumb pointing in the direction of the current, the fingers circled around the wire show the direction of the magnetic field.

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