Question 168: Magnetism and Matter

Question

Figure A and B shown to long straight wires of circular cross-section (a and b with a < b), carrying current I which is uniformly distributed across the cross-section. The magnitude of magnetic field B varies with radius r and can be represented as :

Accepted Answer

Graph for wire of radius R :
As b > a
B
a
> B
b
$${B_a} = {{{\mu _0}i} \over {2\pi a}}$$
$${B_b} = {{{\mu _0}i} \over {2\pi b}}$$

Answer

Answer

Answer

Answer

Magnetism and Matter

Figure A and B shown to long straight wires of circular cross-section (a and b with a < b), carrying current I which is uniformly distributed across the cross-section. The magnitude of magnetic field B varies with radius r and can be represented as :

Choose the correct answer: