Rl Circuit - 50 Microsecond Time Constant
To illustrate RL time constant.
Decade resistor box, circular air-core coil from K2-27, oscillator, wires, and dual trace scope on scope/TV◙cart.
A resistance box and an air-core coil are used in an RL circuit. The inductance of the air-core coil can be calculated (if desired) and the time constant L/R calculated from the inductance and the resistance of the box. This can be compared with the experimental result. The signal source is a low-frequency square wave. See circuit below.