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(a) Draw a labelled diagrame of an ac g...

(a) Draw a labelled diagrame of an ac generator. Obtain the expression for the emf induced
in the rotating coil of N turns each of cross-sectional are A, in the presence of a magnetic
field ` overset(to) (B)` .
(b) A horizonatal conducting rod 10m long extending from east to west is falling with a
speed 5.0 ms `^(-1)` at right angles to the horizontal component of the Earth's magnetic fields.
` 0.3 xx 10^(-4) Wb m^(-2)`. Find the instantaneous value of the emf induced in the rod .

Text Solution

Verified by Experts

(i) See Q . 29, Set-I , Outside Delhi-2011.
(i) e Blv = `0.30 xx10^(-4) xx10xx5= 1.5 xx10^(-3)V` .
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Knowledge Check

  • A 10 m long horizontal wire extends from North east ro South East. It is falling with a speed of 5.0 ms^(-1) , at right angles to the horizontal component of the earth's magnetic field, of 0.3xx10^(-4)Wb//m^(2) . The value of the induced emf in wire is :

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    D
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  • A 10 m long horizontal wire extends from North east to South East. It is falling with a speed of 5.0 ms^(-1) , at right angles to the horizontal component of the earth's magnetic field, of 0.3xx10^(-4)Wb//m^(2) . The value of the induced emf in wire is :

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    `1.5xx10^(-3)V`
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  • Horizontal straight wire of 10 m extending from East to West is falling with the speed of 5 m/s at 90^(@) to the horizontal component of Earth's magnetic field of 0.30 xx 10^(-4) Wb m 2 The instantaneous emf is:

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    C
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    D
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