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Find the strength of the magnetic field in a conductor 0.5m long moving with a velocity of 10m/s, inducing an emf of 20V if magnetic field, velocity and length of conductor are mutually perpendicular to each other.(a) 1T(b) 2T(c) 3T(d) 4T |
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Answer» Right option is (d) 4T Easiest explanation: The formula for induced emf is: emf=Blv if B, l, v are perpendicular to each other. Substituting the values of l, emf and v from the question, we get B=4T. |
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