EM7.1 Medium Time Constant RC Circuit

A simple demonstration in which a 1 mF capacitor is charged through a 15k - Ohm resistor (RC = 15 seconds). The time constant is sufficiently long to easily demonstrate, using only a stopwatch and a voltmeter, that the Voltage across the capacitor has increased to factor of (1-1/e) [63%] times the battery voltage in 15 seconds. No external power supply needed - battery included.

Equipment Location: Shelf C4-2