Problem 18P

A square loop, side a, resistance R, lies a distance s from an infinite straight wire that carries current I (Fig. 7.29). Now someone cuts the wire, so I drops to zero. In what direction does the induced current in the square loop flow, and what total charge passes a given point in the loop during the time this current flows? If you don’t like the scissors model, turn the current down gradually:

Solution 18P

Step 1 of 4:

Consider a square loop of side and having resistance lies at a distance from an infinite wire that carries current .