(a) At what constant speed should the bar move to produce an 8.20-mA current in

Question

(a) At what constant speed should the bar move to produce an 8.20-mA current in the resistor?
m/s

(b) What is the direction of the induced current?

(c) At what rate is energy delivered to the resistor?
mW

(d) Explain the origin of the energy being delivered to the resistor.

A conducting bar of length (a) At what constant speed should the bar move to produce an 8.20-mA current in the resistor? m/s (b) What is the direction of the induced current? (c) At what rate is energy delivered to the resistor? mW (d) Explain the origin of the energy being delivered to the resistor. l = 0.370m. l moves to the right on two frictionless rails as shown in the figure below. A uniform magnetic field directed into the page has a magnitude of 0.290 T. Assume R = 9.10 ? and

Explanation / Answer

a) i = e/R = Bvl/R

v = iR/Bl = (8.2*1e-3*9.1)/(0.29*0.37)

v = 0.69 m/s

b) counter clock wise

c) P = i^2*R = 0.611 mW

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