Question

A straight infinite wire carries steady current of 2 A. The strength of magnetic field due to this wire at a fixed point in its vicinity will?

• A. Change with time
• B. Remain constant with time
• C. may change or remain constant depending upon the point chosen
• D. None of these

Answer 1

The correct option is B Remain constant with time

As the wire is infinite and all the charges are moving at a constant speed, the magnetic field will not change at any point around it.