A coil with 347 turns of wire, a total resistance
of 49 Ω, and a cross-sectional area of 0.28 m2
is positioned with its plane perpendicular to
the ﬁeld of a powerful electromagnet.
What average current is induced in the coil
during the 0.31 s that the magnetic ﬁeld drops
from 2.4 T to 0.0 T?
Answer in units of A
Physics - Elena, Monday, April 22, 2013 at 1:27pm
ℇ=ΔΦ/Δt = N•Δ(B•Acosα)/Δt=
=347•0.28•2.4/0.31•49 = 15.35 A