1. The problem statement, all variables and given/known data Two coils P and Q are placed close to one another, as shown in the first figure attached. The current in coil P is now varied as shown in the second figure. Show the variation with time of the reading of the voltmeter connected to coil Q for time t = 0 to time t = t 2. 2. Relevant equations E = (delta N*flux) / (delta t) and Lenz's law regarding directions. 3. The attempt at a solution I was trying to make a connection between the gradient of the I vs t graph to the V vs t graph but I didn't quite understand why the gradient of the I vs t graph is the voltage. If this is the case, I get the graph to first be horizontal in the negative region and then there's a spike upwards just before t1 and then a spike downwards towards t1 then it's zero from t1 till t2. The spikes are due to the change in current. Thank you.