What is induction in electrical terms?

• A. The process of converting mechanical energy into electrical energy
• B. The act or process of producing voltage by the relative motion of a magnetic field across a conductor
• C. The passage of current through a conductor without resistance
• D. The measurement of electric potential difference between two points

Answer: (B)

Induction is the production of voltage in a conductor caused by a changing magnetic environment. When a magnetic field moves past a conductor or the conductor moves through a magnetic field, the magnetic flux linking the conductor changes with time, and an electromotive force is generated. This phenomenon is governed by Faraday’s law and is guided by Lenz’s law, which says the induced voltage acts to oppose the change in flux. This is the principle behind generators and many electrical devices that rely on changing magnetic fields. The option describing induction matches this idea: voltage is produced by the relative motion of a magnetic field across a conductor. The other statements refer to related but distinct concepts: converting mechanical energy into electrical energy is a broad description of a generator, not the induction mechanism itself; current flowing with no resistance points to superconductivity; and measuring voltage is simply using a voltmeter.