Question

A wire of length 150cm carrying an electric current of 0.1A in the negative x direction and perpendicular to a magnetic field B, experiences a force of 6.0 * 10^-3 N in the positive y direction due to a magnetic field. Find:

A. The magnitude of the magnetic field.

B. Direction of the magnetic field.

Answer 1

Gives

Length (L)=150cm

Current (I)=0.1A

Force (F)=$6\times10^{-3}N$

$F=ILB$

Magnetic field

$B=\frac{F}{LI}$

Put value

$B=\frac{6\times10^{-3}}{150\times10^{-2}\times0.1}$

Direction ($-\hat i)$

B=0.04T