Question

Please answer those questions. Those are about the magnetic force experiment.

Q1. Discuss how the Helmholtz coils creates a magnetic field and what direction it is (You will have to assume a direction of current for this part).
Q2. Discuss how the magnetic torque is created on the 100 turn coil and what it does.

Answer 1

Procedure - Magnetic Field at the Center of a Helmholtz Coil:

Measure the radius of the Helmholtz coil and record the number of turns. Connect the Helmholtz coil

to the DC power supply. You may want to connect an ammeter to the circuit to accurately determine the

current. Using the Hall probe, measure the _eld at the center of the Helmholtz coil (z = 0) for current

values from 0 A to 1 A, in 0.1 Amp increments. Your data table should consist of the different values of

I and B(0). Warning: The coils might get hot - do not leave them unattended and turn o_ the current

when not in use.

direction of magnetic field

Recall the right hand rule for indicating the direction of a magnetic field for a coil of wire carrying a positive current: If you curl the fingers of your right hand in the direction that positive current flows in the coil, your thumb will point in the direction of the magnetic field.