State what would happen to the motor if both the current and magnetic field were reversed simultaneously.

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The direction of rotation of the motor will change.

The motor will stop rotating.

The direction of rotation would remain unchanged.

The motor will start rotating faster.

answer is C.

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Detailed Solution

The direction of rotation of a motor can be reversed by changing the direction of the current or by changing the direction of the magnetic field.
If both the current and magnetic field is reversed simultaneously, the direction of rotation of the motor will remain the same because both effects negate each other, and the system remains identical.
Also, there will not be any change in the speed of rotation of the motor as only the direction of the electric current and magnetic field are changed and magnitudes are unchanged.

Therefore, 'The direction of rotation would remain unchanged.' is the correct response.

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