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K7-01. 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.