t = L/R
Simple...(20*10-3)/230=869 microseconds
A resistor by itself has no time constant. For a circuit to have a time constant it must contain either capacitors or inductors.
The same as the time constant of a 2.7 microfarad capacitor and a 33 ohm resistor connected in series.
In theory ... on paper where you have ideal components ... a capacitor all by itself doesn't have a time constant. It charges instantly. It only charges exponentially according to a time constant when it's in series with a resistor, and the time constant is (RC). Keeping the same capacitor, you change the time constant by changing the value of the resistor.
The final current is E/R = 0.262 = 3/R.R = 3/0.262 ( = 11.45 ohms ).The time constant is RL = 0.532.L = 0.532 / R = (0.532) / (3/0.262) = (0.532) (0.262) / 3= 46.46 millihenrys (rounded)
The time constant for an RL-circuit is equal to L/R. In this case, (0.002 H)/(200 ohm).
Simple...(20*10-3)/230=869 microseconds
You need to convert the inductance value to henry. Then, simply divide the inductance by the resistance.
A resistor by itself has no time constant. For a circuit to have a time constant it must contain either capacitors or inductors.
The time constant of a 4.7 µF capacitor in series with a 22 KΩ resistor is about 103 ms.
The same as the time constant of a 2.7 microfarad capacitor and a 33 ohm resistor connected in series.
I=v/r(1-E [negitive exponintial -RT/L])
In theory ... on paper where you have ideal components ... a capacitor all by itself doesn't have a time constant. It charges instantly. It only charges exponentially according to a time constant when it's in series with a resistor, and the time constant is (RC). Keeping the same capacitor, you change the time constant by changing the value of the resistor.
The final current is E/R = 0.262 = 3/R.R = 3/0.262 ( = 11.45 ohms ).The time constant is RL = 0.532.L = 0.532 / R = (0.532) / (3/0.262) = (0.532) (0.262) / 3= 46.46 millihenrys (rounded)
The time constant of a 0.05 microfarad capacitor and a 200 K ohm resistor in series is simply their product, 0.05 times 200,000, or 10,000 microseconds, or 10 milliseconds. (Farads times ohms = seconds)
A: It is called discharging a capacitor. The charge will follow the rules of a time constant set up by the series resistor and the capacitor. 1 time constant 63% of the charge will be reached and continue at that rate.
Usually a tiny fraction of a second. Actually it will depend on the characteristics of the the capacitor, and of the remaining circuit (mainly, any resistor in series). The "time constant" of a capacitor with a resistor in series to charge from 0 to a fraction of (1 - 1/e), about 68%, of its final value. This time is the product of the resistance and the capacitance. After about 5 time constant, you can consider the capacitor completely loaded for all practical purposes - i.e., it will be at the same voltage as the battery.