Consider the figure, cross-sectional area of conductor at A and B is 2a and a respectively. Current density at A and B are given by JA and JB then JA/JB is

Question

Consider the figure, cross-sectional area of conductor at A and B is 2a and a respectively. Current density at A and B are given by JA and JB then JA/JB is <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/a7a7c48dd11cc3ad11f3b4c85ff5e870-.png" /> (A) (1/2) (B) 2 (C) 1 (D) 4

Tardigrade Admin · Accepted Answer

Current flowing through the resistor will be same throughout J propto (1/ A )

Q. Consider the figure, cross-sectional area of conductor at A and B is $2 a$ and a respectively. Current density at A and B are given by $J_{A}$ and $J_{B}$ then $J_{A} / J_{B}$ is

$\frac{1}{2}$

2

1

4

Current flowing through the resistor will be same throughout
$& J \propto \frac{1}{A}$

Q. Consider the figure, cross-sectional area of conductor at A and B is 2a and a respectively. Current density at A and B are given by JA​ and JB​ then JA​/JB​ is

21​

2

1

4

Current flowing through the resistor will be same throughout &J∝A1​

Q. Consider the figure, cross-sectional area of conductor at A and B is $2 a$ and a respectively. Current density at A and B are given by $J_{A}$ and $J_{B}$ then $J_{A} / J_{B}$ is

$\frac{1}{2}$

Current flowing through the resistor will be same throughout
$& J \propto \frac{1}{A}$