Answer: Mechanical energy.
- A Thermal energy only
- B Mechanical energy
- C Light energy
- D Chemical energy
Correct answer: B. Mechanical energy
Explanation: An electric motor converts electrical energy into mechanical (kinetic) energy using the interaction of current and magnetic field.
The magnetic field around a long straight current-carrying wire forms concentric circles, with direction given by the right-hand rule (point thumb along I, fingers curl in the direction of B).
Concept context
Magnetic force on moving charges and currents, the Biot-Savart law, Ampere's law, and the cyclotron - how electric currents create and respond to magnetic fields.