Question 7
Electromagnetic InductionWhich of the following will not increase the magnitude of the induced emf in a coil?
- A.increasing the number of turns
- B.using a stronger magnet
- C.slowing down the relative motion
- D.increasing the relative speed
Show the answer and explanation
Answer: C (slowing down the relative motion)
Explanation
Induced emf depends on how fast the magnetic flux changes. Slowing the motion makes the flux change more slowly, so the emf falls.