A planar coil of conducting wire has an area of 10 cm ^2 and includes a resistance of 25 omega. The normal to this coil is parallel to a uniform magnetic field of 1.0 T. How much charge will flow through the circuit, if the direction of the magnetic field reverses?
- NCSLv 72 months agoFavourite answer
Δemf = 2*n*A*B / Δt = 2*1*10e-4m²*1.0T / Δt = 20e-4 V / Δt
for Δt in seconds, the time it takes for the field to reverse.
current I = 20e-4V / Δt*25Ω = 8e-5/Δt A
To get the charge, multiply the current by the time:
q = I*Δt = 8e-5 C
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