Magnetic field along the axis of Helmholtz coils

a) Helmholtz coil apparatus

Coil on board arrangement
Number of coils: 2
Coil turns: 150 each
Material: 99% Pure copper
Slider: 50 cm
Coil diameter: 180 mm

b) AC power supply

Output: AC output
Voltage: Selectable (1.2, 2, 4, 6, 8, 10, 12V)
Max. current: 2 A
Key: Built in switch
Rated Input: 220 V/50 Hz or 110 V/60 Hz

c) Gauss meter

Measures magnetic flux up to 20K Gauss
Resolution: 0.1K Gauss
Detachable gauss probe with stand
Rated Input: 220 V/50 Hz or 110 V/60 Hz

d) Connecting wires

4 mm - 4 mm banana pin wires of length 50 cm each