A circular loop of wire with a radius of 14.0 c m and oriented in the horizontal

Question

A circular loop of wire with a radius of 14.0cm and oriented in the horizontal xy-plane is located in a region of uniform magnetic field. A field of 1.8T 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 2.1

ms , find the average emf that will be induced in the wire loop during the extraction process.

answer in V

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) emf = d flux/dt = A dB/dt = pi*.14^2*1.8/2.1E-3= 52.78 V

b) wants to keep the same flux, so will put its induced field in positive z

so counter clockwise

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