Sunday

January 25, 2015

January 25, 2015

Posted by **Julie Calder** on Monday, February 17, 2014 at 10:05pm.

- Physics -
**Julie Calder**, Monday, February 17, 2014 at 10:06pmthat was 1.0 MOhms

- Physics -
**bobpursley**, Monday, February 17, 2014 at 10:32pmRC time constant: 2E-6*1E=6=2seconds

V=Vo (1-e^(-t/RC))

with a little math,

.25=e^-t/rc

take the ln of each side..

-ln(.25) * RC=t

-2ln(.25)=t

t=2.77 seconds check that

**Answer this Question**

**Related Questions**

physics - A 2.0 micro Farad capacitor in a circuit in series with a resistance ...

Physics - A 12 V battery is connected to 5 mega ohm resistor and a 6 micro farad...

Physics - A circuit with a capacitor took .138s to discharge from its max charge...

Physics - Find the Time Constant for a 50 k resistor in a series with a 60 uF ...

Physics - Could someone please tell me what equations i am suppose to use to ...

Physic II - Suppose a capacitor of C=2.0 uF with no excess charge on it is ...

Physics - How long will it take the voltage across the capacitor in an RC ...

Electronics - How long does it take to fully charge a 5µF capacitor in series ...

physics - A 9 V battery is connected in series with a 100 Ω resistor and ...

Physics - A circuit with a capacitor took .128s to discharge from its max charge...