GATE EE 2016 Set 2 — Question 65
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Electromagnetic Fields → Time-Varying Fields → Faraday's & Lenz's Law
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Question
A rotating conductor of length is placed in a radially outward (about the -axis) magnetic flux density () of as shown in figure below. Conductor is parallel to and at distance from the -axis. The speed of the conductor in r.p.m. required to induce a voltage of across it, should be __________.
Correct answer
9.4 to 9.7
Solution
The induced EMF () in a conductor of length moving with a linear velocity perpendicular to a magnetic field of flux density is given by:Given:
- Induced voltage,
- Magnetic flux density,
- Length of the conductor,
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