How long after the switch is closed does the voltage across the resistor drop to Vf = 6.7 v? Answer in units of s. Given: EMF = 13 V, resistance R = 102 ohms, and capacitor C = 1.4 microF. All in series.
After solving a similar problem, the formula i = Io*e^(-t/RC). Io could be found using the formula Io = E/R. And i could be found by the formula i = V/R, using the potential drop given in the question as V. The only thing left to solve for is t, the answer, but thats where I'm having trouble. The variable 'e' is whats causing me some confusion. Any help would be appreciated.
2007-03-27 11:15:50 · 2 answers · asked by mmrage318 1 in Science & Mathematics ➔ Physics
I know that e is a constant, I'm just having trouble solving for t in the equation. I thought it had something to do with the natural log, but i really can't remember
2007-03-27 13:32:44 · update #1
e is not a variable, but a constant, raised to the exponent (-t/RC).
2007-03-27 13:25:28 · answer #1 · answered by Frank N 7 · 0⤊ 0⤋
An electrolytic cap isn't something greater desirable than a 2 pole discreet ingredient that has a special means to have a cathode and anode in close proximity to a minimum of one yet another and due to their close inter coiled wrappings could have electrons faraway from one making it greater electro-helpful and outfitted up on the different making it greater electro unfavourable, if shorted jointly the two poles will quickly stability out and drop the ionic rates . the linked fee for describing the capacitance in an element is a Farad and a microfarad is relatively often used a a divisional unit. The voltage imprinted on the fringe of the cap is indicative of the max variety this is going to tolerate. in spite of if the small air hollow the arc jumps to zap you is approximately 1000volts according to mm//so this is advisable to be somewhat cautious or wham it have been given ya...there ya pass from the E.
2016-12-19 15:20:31 · answer #2 · answered by jepsen 4 · 0⤊ 0⤋