In a motor, a battery provides the necessary push to make the current flow. Option d is correct.
An electric motor is a mechanism that turns electricity into mechanical energy.
The interaction between the motor's magnetic field and electric current in a wire winding generates force in the form of torque imparted to the motor's shaft in most electric motors.
An electric generator is physically equivalent to an electric motor, but it converts mechanical energy into electrical energy using a reversed flow of power
A battery provides the required push for current to flow in a motor.
Hence, option d is correct.
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