A circular loop of wire with a radius of 15.0 cm and oriented in the horizontal

Question

A circular loop of wire with a radius of 15.0 cm and oriented in the horizontal xy-plane is located in a region of uniform magnetic field. A field of 1.7 T is directed along the positive z-direction, which is upward.

A)If the loop is removed from the field region in a time interval of 2.5 ms , find the average emf that will be induced in the wire loop during the extraction process.

B) If the coil is viewed looking down on it from above, is the induced current in the loop clockwise or counterclockwise?

Explanation / Answer

a)

The induced EMF is given as

EMF = rate of change of flux

EMF = pi*0.15^2 *(1.7 - 0)/(0.025)

EMF = 4.8066 V

the induced EMF is 4.8066 V

b)

Now, as the flux is decreasing the induced current will support the applied magnetic field.

Hence, the current is Anti CLockwise

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