A metal disc of radius 100 cm is rotated at a constant angular speed of 60 rad / s in a plane at right angles to an external field of magnetic induction 0.05 Wb / m 2 . The emfinduced between the cent

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A metal disc of radius 100 cm is rotated at a constant angular speed of 60 rad / s in a plane at right angles to an external field of magnetic induction 0.05 Wb / m 2 . The emfinduced between the centre and a point on the rim will be

TestHub · Accepted Answer

Induced emf produced between the centre and a point on the disc is given by e = 2 1 ​ ω B R 2 Putting the values, ω = 60 rad / s , B = 0.05 Wb / m 2 and R = 100 cm = 1 m We get e = 2 1 ​ × 60 × 0.05 × ( 1 ) 2 = 1.5 V

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