The diagram shows a loop L of wire in a uniform magnetic field B.

The loop encloses an area A and the field is directed at an angle θ to the normal to the plane of the loop. The strength of B is increasing at a uniform rate R. What is the emf induced in L?

A. \(\frac{{RA}}{{\cos \theta }}\)

B. RA cos θ

C. \(\frac{{RA}}{{\sin \theta }}\)

D. RA sin θ

B