Question

two wires of A and B are of equal length snd equal resistance. if resistivity of a is more than b which wire is thicker and why ? for electric circuit given below​

Answer 1

Answer:

If the materials are same, for constant length and resistance, area is directly proportional to resistivity. So more the resistivity, more the area of cross section (thickness). Therefore, A is thicker than B.

Answer 2

Explanation:

Wire A:

length:l

Resistivity: rho A

Resistance:R A

Area :A a

Wire B:

length:l

Resistivity :rho B

Resistance :R B

Area:A b

R A= R B

rho A l/A a=rho B l/B b

l A /A a=l B/B b

Given : rhoA >rhoB

rho A = A a > 1

rho B B b

•°• A a>B b

•°• Area of wire A >Area of wire B