Question

A motor converts:
A. Electrical energy into mechanical energy
B. Mechanical energy into electrical energy
C. Electrical energy into heat energy
D. Heat energy into electrical energy

Answer 1

Hint: A motor is an electrical device that is based on the principle that when a current carrying wire is placed in a magnetic field it experiences a torque that causes mechanical rotation. So, it basically uses the current supplied to rotate the coil placed in between magnets.

Complete step by step answer:
Almost every mechanical motion caused in an electrical device is due to the presence of AC or DC motors. An electric motor is majorly composed of an armature coil that is the electromagnet, field magnets that are the permanent magnets and an external current supply. Its working principle is based on the attractive and repulsive forces that are developed between two magnets due to opposite or same polarity of the two magnets brought near each other. Here, when the current carrying coil(electromagnet) is placed in the magnetic field it experiences rotational motion due to torque and hence the electrical energy from the source is converted into mechanical energy.
The correct option is: A. Electrical energy into mechanical energy

Note: The other options in the question were not correct as mechanical energy is converted into electrical energy by using an AC or DC generator, Electrical energy into heat energy is converted using a heating device such as electric heater. Heat energy can be converted into electrical energy by using a thermoelectric generator(Seebeck generator).