Question

A magnet, when moved near a coil, produces an induced current. Which of the following method(s) can be used to increase the magnitude of the induced current?

1. (1) Increasing the number of turm in the coil
2. (2) Increasing the speed of the magnet
3. (3) Increasing the resistivity of the wire of the coil

• A. i, ii
• B. i only
• C. None of these
• D. ii, iii

Answer 1

Answer:

A. i, ii

According to Faraday’s Law of Induction, increasing the number of turns in the coil or the speed of the magnet increases the induced current. Increasing resistivity would reduce current, so options (i) and (ii) are correct