Question 30
Electromagnetic InductionA magnet is moved through a coil of wire. The e.m.f. produced in the wire depends on
- A.the number of turns in the coil
- B.the strength of the magnet
- C.the speed at which the magnet is moved
- D.all of the above
- E.none of the above.
Show the answer and explanation
Answer: D (all of the above)
Explanation
By Faraday's law the induced e.m.f. equals the rate of change of flux linkage, which increases with more turns, a stronger magnet and faster motion.