The diagram below shows an infinitely long currentcarrying w

The diagram below shows an infinitely long current-carrying wire, with two metal loops nearby. By means of a current generator (not shown), we cause the current in the wire to increase with time. Will a current be induced in loop 1? If so, will it be clockwise or counter-clockwise? Will a current be induced in loop 2? If so, will it be clockwise or counter-clockwise?

Solution

a)

no current will induce in the loop 1. because in order to current to induce, the area vector of the loop should be perpendicular to the direction of the magnetic field(produced by the wire).

as we know that magnetic flux = B.A.cos(angle)

here angle = 90. so flux will be zero.

b)

in this case the current will induce because the magnetic field direction and area vector are parallel to each other.

so angle = 0^o

flux will be maximum and = B.A

direction of the current = clockwise