Two metallic wires P and Q obey Ohm’s law

PHYSICS · Single correct · CBSE · Physics · Electricity · Electricity

Problem

Two metallic wires P and Q obey Ohm’s law. Their

V

–

I

graphs pass through the origin. For a current of

2.0\,\text A

, the potential difference across P is

4.0\,\text V

, while across Q it is

6.0\,\text V

. Which of the following statements about their resistances is correct? (a)

R_P > R_Q

and

R_P : R_Q = 3:2

(b)

R_P < R_Q

and

R_P : R_Q = 1:2

(c)

R_P < R_Q

and

R_P : R_Q = 2:3

(d)

R_P > R_Q

and

R_P : R_Q = 2:3