Answer:
Step-by-step explanation:
Imagine that current runs in all the 5 sides . In that case the pentagon will have a magnetic moment directed in z- direction . So in the magnetic field it will experience a torque equal to MB where M is magnetic moment and B is magnetic field. But net force on it will be zero.
So , force on four sides due to magnetic field will be equal and opposite to force on fifth side if current runs through it.
force on fifth side if current runs through it
= BIL
= .222 x 3.33 x .0555
= 41.03 x 10⁻³ N .