Physicsmedium · Past Paper
Which of these factors does NOT affect the induced EMF in a coil?
ASpeed of rotation
BStrength of magnetic field
CNumber of turns in coil
DColor of the wire
✓ Correct Answer: D — Color of the wire
EMF depends on the rate of change of magnetic flux, which is affected by speed, field strength, and turns, not insulation color.
Share this question
More from Physics
- If two bodies of mass 1 kg and 4 kg have the same kinetic energy, the ratio of their momenta is:
- A body thrown vertically upwards reaches its maximum height. At this point, its velocity is:
- If a car travels 100km at 40km/h and the next 100km at 60km/h, the average speed is:
- Calculate the effective resistance of three resistors 3Ω, 6Ω, and 9Ω connected in parallel.
- Archimedes' principle is used in designing: