Question

Which of the following would decrease the magnetic field around a wire?

A)decreasing the current
B)reversing the poles of the wire
C)looping a section of the wire into a solenoid
D)increasing the current

Answer 1

@radar @kelliegirl33 @johnweldon1993

Answer 2

If I remember right...

\[\large B = \frac{\mu_oI}{2\pi r}\]

So here, how would you decrease the magnetic field?

Answer 3

A