A current carrying loop of wire lies flat a table top. When viewed from above, t
ID: 1606481 • Letter: A
Question
A current carrying loop of wire lies flat a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. (a) For points OUTSIDE the loop, the magnetic field caused by this current A) circles the loop in a clockwise direction. B) circles the loop in a counterclockwise direction. C) points straight up. D) points straight down. E) is zero. (b) For points INSIDE the loop, the magnetic field caused by this current A) circles the loop in a clockwise direction. B) circles the loop in a counterclockwise direction. C) points straight up. D) points straight down. E) is zero.Explanation / Answer
a) For points outside the loop, magnetic field is practically zero as magnetic field lines form a curvature with infinite radius. Magnetic field exists only inside the loop.
option E) is correct
b)According to right hand rule, magnetic field points straight up.
option C) is correct