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Q.

The direction of the magnetic field may be determined using an electric current-created magnetic field.

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a

 the thumb rule for the right hand

b

the thumb rule for the left hand

c

Fleming's rule of the left hand

d

Fleming's rule of the right hand.

answer is A.

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Detailed Solution

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Right-hand thumb rule:

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

The right-hand thumb rule is used to determine the direction of an electric current's magnetic field.

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The direction of the magnetic field may be determined using an electric current-created magnetic field.