Question

A wire loop PQRSP formed by joining two semicircular wires of radii R1, and R2 carries a current I as shown in figure below. The magnitude of magnetic induction at centre C is

• A. $(\frac{μ_)}{4})I[\frac{1}{R_2}-\frac{1}{R_1}]$
• B. $(\frac{μ_)}{4})I[\frac{1}{R_1}-\frac{1}{R_2}]$
• C. $μ_0I[\frac{1}{R_2}-\frac{1}{R_1}]$
• D. $μ_0I(\frac{1}{R_1})$

Answer 1

Answer: (B)

$(\frac{μ_)}{4})I[\frac{1}{R_1}-\frac{1}{R_2}]$

Answer 2

The correct option is (B) : $(\frac{μ_)}{4})I[\frac{1}{R_1}-\frac{1}{R_2}]$