A) If a coil of wire in a magnetic field rotates 60 degrees, it provides an emf averaging 3.0 V. If the coil consists of

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A) If a coil of wire in a magnetic field rotates 60degrees, it provides an emf averaging 3.0 V. If the coil consistsof 10 loops of radius 0.5 m and the magnetic field has strength 5T,how long does the coil take to complete its rotation? Assume thecoil is initially parallel to the field.
Δt = 6.5 s
Δt = 2.1 s
Δt = 2.2 s
0.7 V
B) You have a circular loop of wire in the plane of thepage with initial radius 1.0 m which shrinks to a radius of 1m. It sits in a constant magnetic field B = 10T pointing intothe page. Assume the transformation occurs over 10 secondsand no part of the wire exits the field. Also assume an internalresistance of 30 Ω. What average current is produced withinthe loop and in which direction?
79 mA, CW
79 mA, CCW
701 mA, CCW
Zero
C) A field B = 10 T points in the +y direction. Arectangular circuit of wire with area 200 mm2, which isinitially in the x-z plane, rotates into the x-y plane as shown. Ifthis process is smooth and takes 20 ms, what is the magnitude ofthe emf ε induced in the loop?

A If A Coil Of Wire In A Magnetic Field Rotates 60 Degrees It Provides An Emf Averaging 3 0 V If The Coil Consists Of 1 (106.59 KiB) Viewed 40 times

1 V
1x10-4 V
10 V
0.1 V