Which one of the following is not a derived quantity a)speed b)velocity c)time d)force​

c) time

Explanation:

time is a fundamental quantity from which other quantities are derived

coil wire, increase current, put iron inside the coil

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.