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ArtVandelay
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Homework Statement
The figure below shows a short coil which is coaxial with a very long solenoid (you may approximate it as infinite.)
Coil: Has 120 turns of radius 1.8 cm and resistance 5.8 . It is not attached to anything.
Solenoid: Has 22700 turns/m and a radius of 1.6 cm. It receives an external current (source not shown).
a.) The magnetic field across the coil's entire cross-sectional area (as caused by the solenoid) at any given time: ?
b.) If the current supplied to the solenoid drops at a constant rate from 1.5 A to zero in in a time interval Δt = 25 ms, What are the magnitudes of the emf and current induced in the coil during this time interval?
c.) What is the mutual inductance of this solenoid/coil system?
Homework Equations
Mutual inductance of coil 2 with respect to coil 1 = M12 = ( N2 * flux12 ) / I1
Mutual-induced emf by 1 on 2 = ε2 = - M * d/(dt) * I1
Bsolenoid = μoNI/l
flux = integral of B dot dA
The Attempt at a Solution
For part (a):
Is a non-zero constant inside the solenoid and zero everywhere else?
For part (c):
I get the mutual inductance, M, is equal to ( μo * N1 * N2 * Area ) / length, however I'm not given a length.
Homework Statement
Homework Equations
The Attempt at a Solution
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