Question

The magnetic field intensity at the centre of cubical cage of identical wires of length ?a? due to a current I flowing as shown in the fiigure is

• A. $\frac{21}{a}$
• B. $\frac{\sqrt{21}}{a}$
• C. 0
• D. I/2a

Answer 1

Answer: (C)

0

Answer 2

For symmetrical current distribution, magnetic field at the centre due to all current carrying conductors will get cancelled. Hence $B_{net} =0$