The same potential difference is applied across two wires.Wire A carries twice the current of wire B.If the resistance of wire B is R,what is the resistance of wire A?
A)R
B)2R
C)R/2
D)4R
E)R/4

Question

Quizplus · Accepted Answer

The resistance of wire A is R/2 because the current through wire A is twice that of wire B, and since both wires have the same potential difference, according to Ohm's law (V = IR), wire A must have half the resistance of wire B to allow twice the current through it.

The Same Potential Difference Is Applied Across Two Wires