Question

Which of the following best describe the electromagnetic induction?

• A. The ability of a changing magnetic field to induce a voltage in a conductor
• B. The ability of a conductor to generate a magnetic field
• C. The ability of a static magnetic field to induce a voltage in a conductor
• D. The ability of a permanent magnet to induce a voltage in a coil
• E. The ability of a conductor to induce a magnetic field

Answer 1

Answer: (A)

The ability of a changing magnetic field to induce a voltage in a conductor

Electromagnetic induction is a process where a conductor placed in a changing magnetic field (or a conductor moving through a stationary magnetic field) causes the production of a voltage across the conductor.

Changing magnetic field causes a change in flux which gives rise to induced emf.

Also, a moving rod in a uniform magnetic field would mean moving electrons in a magnetic field which would exert force on them to move in a particular direction in the rod, thus creating a potential difference across ends.