Question

A movable bar of length 25cm is part of a circuit that includes a 1000 Ohm resistor. The circuit lies in the plane of the page and is in a region of space where a magnetic field of 0.25 T points into the page (see the figure below). If the bar is being moved at a speed 0.1m/s to the right, the power dissipated by the resistor is:

a)1.0x10^-5 W

b)6.25 x 10^-6 W

c)3.9x10^-8 W

d)5.7 x 10^-10 W

A movable bar of length 25cm is part of a circuit that includes a 1000 Ohm resistor. The circuit lies in the plane of the page and is in a region of space where a magnetic field of 0.25 T points into the page (see the figure below). If the bar is being moved at a speed 0.1m/s to the right, the power dissipated by the resistor is: a. 1.0 x 10-5 W b. 6.25 x 10-6 W c. 3.9 x 10-8 w d. 5.7 x 10-10 W ike B-0.250 olms

Answer 1

Power - (EnfJ2 (Blv.)? R R (0.25% 0.25X0.1) 1000 - 3.9x10-8 watt

Correct option is C

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