Question

Consider a rectangulal wire coil is 50cm wide by 15cm tall. there are ten loops in the coil. notice the 20 ohm resistor in thr bottom of the coil. the rectangular loop is pulled apart by the sides so that it stretches into a very think loop in 3 seconds. there is a 4 T magnetic field pointed out of the page

determine the current magnitude induced in the resistor.

determine the dirstion of the current throught rhe resistor

Answer 1

Solution) A= l x6 = 50cm x 15 cm Area, A=0.50m x 0.15m = 0.075 m² N=10 loops R=200 t=3s B = 4T Current, i ? i=1&l ($= B. A) Tel Ndd dt I el= Nd (BA) dt 1 21 = (10) (W) (0.075) 3 = 0.05 20 i = 21 is = 0.05 LA Direction is Ante clockwise