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Unformatted text preview: coil Flux can change: 1. Magnitude of changes. 2. Area of loop changes. 1 3 3. The angle changes. 4. Any combination of the three. 1 4 Example: Consider a coil with 200 turns on a rectangular frame, 20 cm by 30 cm. The resistance of the coil is 2 Ω. 1 5 If increases uniformly from zero to in 0.8 s what is the current in the coil? At At 1 6 The current will be 1 7 Lenz’s Law A changing magnetic flux will cause an emf and if the emf is in a conductor there will be a current. What will be the direction of the current? Lenz’s Law will answer that question. 1 8 The polarity of the induced emf is such that it tends to produce a current that will...
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This document was uploaded on 03/20/2014 for the course CHEM 100A 100A at UCSD.
- Spring '11