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A metal rod 1.5 m long rotates about its one end in a vertical plane at right angles to the magnetic meridian. If the frequency of rotation is 20 rev/s. Find the emf induced between the ends of rod.
BH = 0.32 ´ 10-4T: Horizontal component of earth’s magnetic field.
Dear aakash,
The given information is as follows:
Length of rod = 1.5 mt.
Frequency of rotation = 20 rev/sec.
BH = 0.32 * 10-4 T
Angular velocity of rod = 20 * 2∏ rad/sec.
emf induced = B*dA/dt = 0.32*10-4 *20*∏*(1.5)2.
Therefore horizontal component of the earth's magnetic feild is = 4.5 * 10-3 V.
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