The current in the straight wire changes accordingly to I(t) = (0.500 A) cos[(275 s-1)t] . Find the expression for the induced current in the rectangular loop. The resistance of the loop is R. It has dimensions a and b, and it is separated at a distance d from the wire.

Students in an introductory physics lab are performing an experiment with a parallel-plate capacitor made of two circular aluminum plates, each 11 cm in diameter, separated by 1.0 cm. how much charge can be added to each of the plates before a spark jumps between the two plates? for such flat electrodes, assume that value of 3×106n/c of the field causes a spark.