On the fifth floor of the physics building, you are in a laboratory class studying induction. You are using a computer to measure emf values from a solenoid when suddenly a thunderstorm breaks out. You see a large blip on the computer screen and \(2.0 \mathrm{~s}\) later hear a loud thunderclap. Looking out the window, you see that straight ahead a tree was struck by lightning. You quickly save the data on your computer (plotted in Figure P29.75) and note that the solenoid happens to be oriented at an angle of \(\theta=40^{\circ}\) with respect to your line of sight to the tree. The solenoid windings have cross-sectional area \(A=0.10 \mathrm{~m}^{2}\), and there are \(N=100\) windings. You wonder about the current involved in the lightning flash that struck the tree.

Data from Figure P29.75

Transcribed Image Text:

(mV) 3 2 1 HO H&H 101 0.1 0.2 0.3 0.4 101 0.5 0.6 (s)