A wire `KMN` moves along the bisector of the angle `theta` with a constant velocity `v` in a uniform magnetic field `B` perpendicular to the plane of the paper and directed inward. Which of the following is correct?

Options

A. Effective length of the wire is `2L sin""(theta)/2`
B. E.m.f induced between K and N is `2BLV sin ""(theta)/2`
C. The shape of KMN is immaterial, only the end points KN are important.
D. All the above

Answer

D

Explanation

`e=Bl^(eff)v, l_(eff) =2(l sin theta//2)`