A coil of 200 turns and resistance is pulled away from a bar magnet so that the…
PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
A coil of 200 turns and resistance 10Ω is pulled away from a bar magnet so that the magnetic flux linked with the coil decreases uniformly from 5.0×10−2Wb to zero in 0.25s. Calculate the mechanical work that the external agent must do during this interval.