A wire 88 cm long bent into a circular loop is placed perpendicular to magnetic field of flux density 2.5 wb /m^2. With in 0.5 sec the loop is changed to a square of side 22 cm and flux density is increased to 3 wb/m^2.Calculate the value of emf induced?

1 Answer
Trevor Ryan.
Sep 1, 2015

8,86 mV

Explanation:

Faraday's Law states that the emf induced in a coil is directly proportional to the time rate of change of magnetic flux through the coil. The magnetic flux in Weber may be given as the product of the flux density in Tesla with the area through which the flux lines passes in square metres. Applying the appropriate formula for the shapes given, the answer is given in the picture below: enter image source here

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