- #1
jordanl122
- 14
- 0
This one is really getting to me.
Find the current through section PQ (the middle column of the circuit) of length a, a =.65 m. The circuit is located in a magnetic field whose magnitude varies with time according to the expression B(t) = .001t. Assume the resistance per length of wire is .1 ohm/m.
Diagram:
key: I: piece of circuit
X: direction of B field
-----------P
IIIIIIIIIIIIIIIIIIIIIIIII
I X X X X I X X X I
I X X X X I X X X I a
I X X X X I X X X I
IIIIIIIIIIIIIIIIIIIIIIIII
-----2a---Q----a---
I started by using Faraday's law of inductance,
Emf = -d Phi_m/dt
but I am not exactly sure how this will help me. I foresee a kirchhoff analysis, but I'll be damned if I can figure out how I arrive there
Find the current through section PQ (the middle column of the circuit) of length a, a =.65 m. The circuit is located in a magnetic field whose magnitude varies with time according to the expression B(t) = .001t. Assume the resistance per length of wire is .1 ohm/m.
Diagram:
key: I: piece of circuit
X: direction of B field
-----------P
IIIIIIIIIIIIIIIIIIIIIIIII
I X X X X I X X X I
I X X X X I X X X I a
I X X X X I X X X I
IIIIIIIIIIIIIIIIIIIIIIIII
-----2a---Q----a---
I started by using Faraday's law of inductance,
Emf = -d Phi_m/dt
but I am not exactly sure how this will help me. I foresee a kirchhoff analysis, but I'll be damned if I can figure out how I arrive there
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