Motional EMF Video Lessons

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Problem: A conducting rod of length 0.20 m makes slides without friction on conducting metal rails, as shown in the sketch. The apparatus is in a uniform magnetic field that has magnitude B = 0.400 T and that is directed into the page. The resistance of the circuit is a constant R = 5.00 Ω.In a 3.00 s interval, how much work does the external force do on the bar if the bar is moving with constant velocity 12 m/s?

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Problem Details

A conducting rod of length 0.20 m makes slides without friction on conducting metal rails, as shown in the sketch. The apparatus is in a uniform magnetic field that has magnitude B = 0.400 T and that is directed into the page. The resistance of the circuit is a constant R = 5.00 Ω.

In a 3.00 s interval, how much work does the external force do on the bar if the bar is moving with constant velocity 12 m/s?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Motional EMF concept. You can view video lessons to learn Motional EMF. Or if you need more Motional EMF practice, you can also practice Motional EMF practice problems.

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Our expert Physics tutor, Juan took 5 minutes and 35 seconds to solve this problem. You can follow their steps in the video explanation above.