Question

A vertically oriented square loop of copper wire falls from rest in a region in which the field B is horizontal uniform, and perpendicular to the plane of the loop, into a field-free region, see (Figure 1). The side length of the loop is s and the wire diameter is d. The resistivity of copper is pr and the density of copper is pm If the loop reaches its terminal speed while its upper segment is still in the magnetic field region, find an expression for the terminal speed.

What is the direction of omf and current?

Part D Complete previous part(s) 

Part E Complete previous part(s)

Answer 1

● Clockwise .

According to lenz's law direction of an induced current is always such as to oppose the change in the circuit or the magnetic field that produces it.

Here the magnetic flux is decreasing hence the the current flow will be such that the induced magnetic field will be in direction of the applied magnetic field . As it will try to increase the magnetic flux . So the current will be in clockwise direction .