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  4. A straight conductor of length 4 m moves at a speed of 10 m / s. When the conductor makes an angle of 30° with the direction of magnetic field of induction of 0.1 wb. per m 2 then induced emf. is :

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Q. A straight conductor of length $4\, m$ moves at a speed of $10\, m / s$. When the conductor makes an angle of $30^{\circ}$ with the direction of magnetic field of induction of $0.1\,wb$. per $m ^{2}$ then induced emf. is :

Rajasthan PMTRajasthan PMT 2005Electromagnetic Induction

Solution:

Induced emf is given by
$e=B v l \sin \theta=0.1 \times 10 \times 4 \sin 30^{\circ}$
$e=2$ volt