Question

Four long and parallel wires each carrying current I are kept at the corners of a square having side a. Magnetic field produced at centre C is-

• A.
• B. $\sqrt { 2 }$
• C.
• D.

Answer 1

Answer: (A)

Answer 2

Resultant magnetic field

B = = 2B $\sqrt { 2 }$

= 2 $\sqrt { 2 }$ =