A current in a wire increases from 2 A to 6 A. How will the magnetic field 0.01 m from the wire change?

For a straight wire, the magnetic field at a fixed distance is directly proportional to the current. The current changes from 2 A to 6 A, which is a factor of 6 ÷ 2 = 3, so the field becomes three times its original value. The correct choice is “It increases to three times its original value.”

AI-written and checked against the verified answer.