Deluxe Current Balance Kit

This kit includes an air core solenoid and a current balance for demonstrating and measuring the small force experienced by a conductor carrying an electric current in a magnetic field. To run the experiment, one half of the current balance is placed inside the solenoid. The other half has an adjustable counterweight and can carry light additional masses. When current is supplied to the balance and solenoid from an external power supply, the balance deflects. Adding light masses until balance is restored allows the force on the conductor to be measured.

Air core solenoid includes a clear acrylic former and large diameter to easily fit the current balance. Five tappings give easy access to windings of 100, 200, 300, 400 and 500 turns by simply
moving one plug between the five red binding posts. The coil has
a total resistance of 20 Ω, or 4 Ω per 100 windings and can carry up
to 1.5A of current in a single 100-turn segment, allowing a 6VDC power
source to be used (and up to 12V for the full 500 turns). Includes activity
guide.

Specifications of current balance:

• Balance: 240mm x 65mm x 3mm
• Base: 87mm x 87mm x 35mm

Specifications of air core solenoid:

• Coil Diameter: 9.0cm
• Coil Length: 4.0cm
• Total turns: 500
• Total coil resistance (500 turns): 20 Ω
• Maximum current: 1.5A (through one segment)
• Width: 12cm Depth: 20cm Height: 11cm Weight: 360g