Physics question dealing with changing magnetic flux! Need help!?

Posted on 2015-09-19 08:52:00 in Physics by JEIN

Joe has rolled a long electrical extension cord into a coil of radius rc = 15 cm with Nc = 14 loops. The coil of extension cord is initially laying horizontally (flat) on the floor of Joe’s garage. Joe picks up the coil and rotates it 90 degrees in tr = 0.75 seconds so that the coil is now vertically oriented.

A) If the Earth’s magnetic field has strength 0.50 gauss and makes an angle of 20.0 degrees with the garage floor, calculate the change in the magnetic flux ??B, in Wb, through one of the loops of the coil during the rotation.
B)Calculate the average induced emf ?c, in volts, in the coil during the rotation.
C)If the extension cord had a resistance of 3.0 ohms, calculate the induced current Ic, in amps, in the extension cord.

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