In this problem, we will find the current in a square loop (with total resistance R and side length A) caused by a time-varying current, I(t) : Ioe-wt, carried by an infinite wire. 1The dipole moment ñ of a planar loop of area A carrying current I has magnitude m = IA. However, not all dipoles are circulating currents. Elementary particles such as electrons, protons, and neutrons have intrinsic dipole moments. I(t) (a) What is the magnetic field as a function of time any distance away from the current carrying wire? Sketch the system (including a coordinate system) and put your answer in terms of a unit vector. (b) What is the total magnetic flux into the loop? (c) What EMF does this induce in the loop? (d) What is the current in the loop? Specify whether positive current means clockwise or counterclockwise flow in your expression. (e) What is the net charge flow through a point in the loop between t = 0 and t = ? (f) What is the total amount of energy that has been burned from current passing over the resistance of the wire?

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2. Electric Field off a Wire
In this problem, we will find the current in a square loop (with total resistance R and side
length A) caused by a time-varying current, I(t) = Ioe¬wt, carried by an infinite wire.
'The dipole moment ñ of a planar loop of area A carrying current I has magnitude m = IA. However, not all
dipoles are circulating currents. Elementary particles such as electrons, protons, and neutrons have intrinsic dipole
moments.
A
I(t)
(a) What is the magnetic field as a function of time any distance away from the current
carrying wire? Sketch the system (including a coordinate system) and put your answer in
terms of a unit vector.
(b) What is the total magnetic flux into the loop?
(c) What EMF does this induce in the loop?
(d) What is the current in the loop? Specify whether positive current means clockwise or
counterclockwise flow in your expression.
(e) What is the net charge flow through a point in the loop between t = 0 and t = x?
(f) What is the total amount of energy that has been burned from current passing over the
resistance of the wire?
Transcribed Image Text:2. Electric Field off a Wire In this problem, we will find the current in a square loop (with total resistance R and side length A) caused by a time-varying current, I(t) = Ioe¬wt, carried by an infinite wire. 'The dipole moment ñ of a planar loop of area A carrying current I has magnitude m = IA. However, not all dipoles are circulating currents. Elementary particles such as electrons, protons, and neutrons have intrinsic dipole moments. A I(t) (a) What is the magnetic field as a function of time any distance away from the current carrying wire? Sketch the system (including a coordinate system) and put your answer in terms of a unit vector. (b) What is the total magnetic flux into the loop? (c) What EMF does this induce in the loop? (d) What is the current in the loop? Specify whether positive current means clockwise or counterclockwise flow in your expression. (e) What is the net charge flow through a point in the loop between t = 0 and t = x? (f) What is the total amount of energy that has been burned from current passing over the resistance of the wire?
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