According to Ohm’s law, resistance is equal to voltage divided by

a. time.

b. conduction.

c. current.

d. potential.

c) current

Explanation:

Ohm's law states that the current I flowing through a conductor of resistance R is directly proportional to the voltage or potential difference V applied across its terminals provided that the temperature and other necessary conditions remain constant.

Mathematically this law can be written as follows;

When we make R the subject of formula from equation (1), we get the following;

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.

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.