Operation of a motor:
A motor takes electrical energy as input which energizes the windings of the motor and a changing magnetic field is generated which in turn generates force in the form of torque.
Let us have a look at the given options:
Option 1:
A motor works by changing the magnetic flux to change the voltage of a circuit.
This is incorrect.
Option 2:
A motor works by electrical energy moving a charge through a loop in a magnetic field, causing the loop to rotate.
This is the correct statement, this is how a motor operates.
Option 3:
A motor works by rotating a magnet in order to generate electricity.
This is incorrect since a motor consumes electricity (it does not generate electricity)
Option 4:
A motor works by using physical work to push a charge through a loop, generating a uniform magnetic field.
This is incorrect since a motor does not physical work to operate.
Therefore, the only correct statement is option 2
