Square Loop
Posted in Bed Comforter Sets on 07/04/2005 05:08 pm by admin
An emf is induced in a conducting loop of wire 1.25m long as its shape is changed from square to circular. Fin?
An emf is induced in a conducting loop of wire 1.25m long as its shape is changed from square to circular. Find the average magnitude of the induced emf if the change in shape occurs in 4.50s and the local 0.110-T magnetic field is perpendicular to the plane of the loop.
Edit:
Faraday’s Law: N=1
Emf = Δflux/Δt = -N*B*ΔA/Δt
The area of the loop changes
from a square to a circle in 4.5 s
B = 0.11 T
L = 1.25 m
r = L / (2 * π) m
A_c = π * r ^ 2 m^2 (area circle)
A_s = (L / 4) ^ 2 m^2 (area square)
Δt = 4.5 s
Emf = -N*B*ΔA/Δt
Emf = -B * (A_s – A_c) / Δt
Emf= 6.52267105501425E-04 V
Emf= 6.5E-04 V
The flux density does not change.
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