A circular copper ring of radius r translates in its plane with a constant velocity v. A uniform magnetic field B exists in the space in a direction perpendicular of the plane o the ring. Consider different pairs of diametrically opposite points on the ring. (a) Between which pair of points is the emf? (b) Between which pair of points is the emf minimum? What is the value of this minimum emf?

Answer

A, B, C, D

Explanation

`epsilon_(max)=epsilon_(AC)=BV(2r)`
`epsilon_(min)=epsilon_(BD)=0`