Question

Shown in the figure is a conductor carrying a current i. The magnitude of magnetic field at the origin is

• A.
• B. $\frac { \mu _ { \mathrm { o } } \mathrm { i } } { 4 \mathrm { r } } \left( \frac { 1 } { \pi } \hat { \mathrm { i } } - \frac { 1 } { 2 } \hat { \mathrm { j } } \right)$
• C.
• D.

Answer 1

Answer: (A)

Answer 2

Where,

(Semi-infinite straight wire)

B₂ = (One quarter of a circular loop) and B₃ = 0 (since the line of the wire 3 passes through the origin)

_.Hence (1) is correct.