A long horizontal rigidly supported wire carries a current I1) = 200 A. Directly above it and parallel to it is a fine wire that carries a current I2 = 40 A and weights 0.073 nt/meter. i. How far above the lower wire should this second wire be strung to support it by magnetic repulsion? Assume u↓0 = 4π× 10ˉ7 weber/amp-m. [

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Chapter1: Units, Trigonometry. And Vectors
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Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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(b) A long horizontal rigidly supported wire carries a current I1) = 200 A. Directly above
it and parallel to it is a fine wire that carries a current I2 = 40 A and weights 0.073
nt/meter.
i. How far above the lower wire should this second wire be strung to support it
by magnetic repulsion? Assume u↓0 = 4π× 10ˉ7

weber/amp-m.
[

B.
wCM
A
3o em
3. A long solenoid has 400 turns/cm and carries a current of 1.5 A . Its
diameter is 3.0 cm. A 100-turn close-packed coil of diameter 2.0 cm is
placed at its center. The coil is arranged so that magnetic field B at the center
of the solenoid is parallel to its axis. The current in the solenoid is reduced
to zero and then raised to 1.5 A in the other direction at a steady rate over a
period of 0.050 s.
Transcribed Image Text:B. wCM A 3o em 3. A long solenoid has 400 turns/cm and carries a current of 1.5 A . Its diameter is 3.0 cm. A 100-turn close-packed coil of diameter 2.0 cm is placed at its center. The coil is arranged so that magnetic field B at the center of the solenoid is parallel to its axis. The current in the solenoid is reduced to zero and then raised to 1.5 A in the other direction at a steady rate over a period of 0.050 s.
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