A flat coil of 200 turns and mean area is placed with its plane normal to a uniform…
PHYSICS · Multi-part · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
A flat coil of 200 turns and mean area 50cm2 is placed with its plane normal to a uniform magnetic field. The field is increased uniformly from 0.20T to 0.80T in 0.020s. The resistance of the coil is 5Ω.
(i) Calculate the magnitude of the average emf induced in the coil during this time interval.
(ii) Find the average current that flows in the coil.
(iii) Determine the total charge that passes through any cross-section of the coil in this interval.