Question

For a constant voltage, how is the resistance related to the current?

A. Resistance is inversely proportional to current, so when the resistance doubles, the current is cut in half.

B. Resistance is directly proportional to current, so when the resistance doubles, the current is cut in half.

C. Resistance is inversely proportional to current, so when the resistance doubles, the current doubles.

D. Resistance is directly proportional to current, so when the resistance doubles, the current doubles.

Answer 1

Explanation:

b option is correct

according to ohm law

v = RI

I = V/R. (1)

if resistance is doubled

R' = 2R

V is same. ( given)

I '= v/ R'

I' = v/ 2R. ( from above )

I' = I /2

thus current become half