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College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

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BuyFindarrow_forward

College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

A horizontal metal bar oriented east-west drops straight down in a location where Earth's magnetic field is due north. As a result, an emf develops between the ends. Which end is positively charged? (a) the east end (b) the west end (c) neither end carries a charge

To determine
The positively charged end.

Explanation

Lenz’s law states that the induced current flows in such a direction that the magnetic field associated to it tends to oppose the change that produces it.

Conclusion:

The magnetic field is along the north. The force due to magnetic field pushes the positive charges to the east. The electrons will move towards the west...

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