The direction of 0.04 T magnetic field is 30 degrees above a horizontal, a wire moves horizontally at 24 m/s, the EMF that is induced in the wire equals 0.72 V.

What is the length of the wire?

A. 0.15m

B. 1.5m

C. 7m

D. 0.5m

are there answer choices to this question? this seems like a question where you have options to choose from.

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j