Which machine converts mechanical energy into electrical energy?

Which machine converts mechanical energy into electrical energy?

• A. Solenoid
• B. Generator
• C. Transformer
• D. Electric Motor

Answer: (B)

The device that turns mechanical energy into electrical energy is the generator. In a generator, mechanical work rotates a coil in a magnetic field (or rotates magnets around coils), which changes the magnetic flux and induces an electric current in the conductors through electromagnetic induction. This is exactly energy transfer from the rotor’s motion into electrical energy in the output circuit. A solenoid is just a coil that can create or respond to a magnetic field but doesn’t by itself convert motion into electricity. A transformer transfers electrical energy between circuits and relies on existing electrical energy, not mechanical work. An electric motor takes electrical energy and converts it into mechanical energy, the reverse process.

The device that turns mechanical energy into electrical energy is the generator. In a generator, mechanical work rotates a coil in a magnetic field (or rotates magnets around coils), which changes the magnetic flux and induces an electric current in the conductors through electromagnetic induction. This is exactly energy transfer from the rotor’s motion into electrical energy in the output circuit. A solenoid is just a coil that can create or respond to a magnetic field but doesn’t by itself convert motion into electricity. A transformer transfers electrical energy between circuits and relies on existing electrical energy, not mechanical work. An electric motor takes electrical energy and converts it into mechanical energy, the reverse process.