Electricity and magnetism for advanced students (1920)
Starling, Sydney George, 1873- · London Longmans, Green · leaf 316
ly be found ; it is— di r . Jit _ r XI. GROWTH OF CURRENT 305 This gets less as i approaches its final value /o> but for any value of irit is proportional to j. The rate at which a current approaches its rfinal value therefore depends upon the ratio y and not upon the separate values of r and Z.… … 4x/o^Sec. The ratio - is called the Time Constant, X, of the circuit, and theequation for the current may be written — After time A, A). . 1-718 ^ . = *o-2:718 ~ 0632«o. 1*718Thus the time constant is the time in which a current reaches 977TQ or roughly two-thirds of its final value. The four…
Electricity · Magnetism
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