You have a circular coil of radius 25 cm with 200 turns and resistance 5 \(\Omega\) that you would like to use to generate some power for charging your phone. You look up and see that 9 m above you is a long, straight power line that you estimate has a maximum current of 700 A alternating at 50 Hz. Estimate the maximum current through your coil.
A*R*C*S29.7.2.Circuit II.
Figure29.7.1.Circuit diagram.
Shown below is a circuit with an ideal battery, a linear resistor, and an ideal inductor. This circuit has been connected for a very long time (with the switch open), and you measure the current through the inductor to be \(I_A\text{.}\) At time \(t_1\text{,}\) you close the switch. You then wait a long time and measure the current through the inductor to be \(I_B\text{.}\) Is \(I_B\) greater than, less than, or equal to \(I_A\text{?}\)
