How Is Magnetic Field Strength Calculated in a Solenoid with a Current Balance?

[skg94]

Homework Statement

A solenoid lies horizontally with a current balance WXYZ balanced in the solenoid core. Sides WX and ZY are 7.1 cm and side XY is 1.9cm. A current of 6.0A flows through the conductor of the balance. If a 17.6g mass is necessary to balance the current balance what is the magnetic field strength of the solenoid - ANSWER - 1.51T

Homework Equations

Fm=Fg
BIL=mg

The Attempt at a Solution

i attempted to do them seperately.

b= mg/IL that is literally all i can get from this perphaps if i was given a diagram it would help.

Ive tried substituing l as 7,1 and 1.9, adding the two lengths and subtracting them didnt work
anyone know how to do this?

 

[Simon Bridge]

You should be able to sketch a solenoid and a current balance yourself.
The question is asking you about induced currents due to a magnetic field.

 

[Simon Bridge]

You should be able to sketch a solenoid and a current balance yourself.
The question is asking you about induced currents due to a magnetic field.