do only b. A uniform B field decreases at a constant rate dB/dt = -K, where K is
ID: 1612217 • Letter: D
Question
do only b.
A uniform B field decreases at a constant rate dB/dt = -K, where K is a positive constant. A circular loop of wire of radius a containing a resistance R and a capacitance C is placed with its plane normal to the field. (a) Find the charge Q on the capacitor when it is fully charged. (b) Which plate, upper or lower is at the higher potential, i.e., is the upper plate positively or negatively charged? (For maximum points, clearly label and indicate the direction of the induced magnetic field and the current in the loop while charging.)Explanation / Answer
b.)upper plate is at higher potential
direction of current will be clockwise as the magnetic field is decreasing so it will try to increase the magnetic field so the direction of current will be clockwise.
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