How much work is done when 0.0042 C is moved through a potential
difference of 12.0 V? Use W = qV.
O
A. 0.050 J
O
B. 0.00035 J
O C. 2900
O D. 12J

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length

a

explanation:

no diagram was provided, but i'm guessing it's the one i've attached to my answer.

here, a mechanical force turns the rod.   this generates an electric current in the coil, which powers the bulb.