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Author Question: A long vertical wire carries a steady 70 A current. As shown in the figure, a pair of horizontal ... (Read 73 times)

Brittanyd9008

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on: Oct 11, 2019

Question 1

A round flat metal coil has 180 turns and negligible resistance. It is connected in a series circuit with a resistor, with nothing else in the circuit. You measure that a current flows through the resistor when a magnetic field through the coil, perpendicular to its area, is changing at What is the radius of the coil?
◦ 0.54 m
◦ 0.25 m
◦ 0.014 m
◦ 0.043 m

Question 2

A long vertical wire carries a steady 70 A current. As shown in the figure, a pair of horizontal rails are 0.20 m apart. A 20-Ω resistor connects points a and b, at the end of the rails. A bar is in contact with the rails, and is moved by an external force with a constant horizontal velocity of 0.90 m/s to the right, as shown. The bar and the rails have negligible resistance. At the instant that the bar is 0.20 m from the wire, what are the induced current in the resistor and its direction through the resistor? (μ0 = 4π × 10-7 T ∙ m/A)



◦ 0.63 μA, from a to b
◦ 0.32 μA, from a to b
◦ 0.32 μA, from b to a
◦ 0.63 μA, from b to a
◦ 1.9 μA, from b to a
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Marked as best answer by Brittanyd9008 on Oct 11, 2019

wshriver

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Reply #1 on: Oct 11, 2019
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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Brittanyd9008

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Reply #2 on: Oct 11, 2019
Excellent


wshriver

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Reply #3 on: Oct 11, 2019
Great! Please up vote :D


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