Question

The figure shows four wire loops, with edge length of either `L` or `2L`. All four loops will move through a region of uniform magnetic field `vecB` (directed out of the page) at the same constant velocity . Rank the four loops according to the maximum magnitude of the e.m.f. induced as they move through the field, greatest first

A. `(e_(c)=e_(d))lt(e_(a)=e_(b))`
B. `(e_(c)=e_(d))gt(e_(a)=e_(b))`
C. `e_(c)gte_(d)gte_(b)gte_(a)`
D. `e_(c)lte_(d)lte_(b)lte_(a)`

Answer 1

Correct Answer - B
`EMF` induces across the length of the wire which cuts the magnetic field. `("length of" c="length" d)gt`
`("length of" a=b)`. So `(e_(c)=e_(d))gt(e_(a)=e_(b))`