Why Can't Voltage Change Instantly in a Capacitor or Current in an Inductor?

456 5

Report a violation of the law

Reply | New topic

#1 21671356 21 Apr 2014 05:25

Bhuvanesh Nick Bhuvanesh Nick

Anonymous

Post #1
21671356 21 Apr 2014 05:25

Voltage and why voltage cannot change instantaneously in capacitor but current but why current cannot change instantaneously in inductor. Thank you in advance.
ADVERTISEMENT
Capacitor and inductor equations require infinite impulse values
#2 21671357 21 Apr 2014 09:17

DAVID CUTHBERT DAVID CUTHBERT

Anonymous

Capacitor and inductor equations require infinite impulse values
Post #2 21671357 21 Apr 2014 09:17

Two formulas illustrate this.

The formula i = C dV/dt says that the current thru a capacitor is equal to capacitance multiplied by dV/dt. To change voltage instantaneously (infinite dV/dt) the current must be infinite.

To formula V = L di/dt says that the voltage across an inductor is equal to inductance multiplied by di/dt. To change current instantaneously (infinite di/dt) the voltage must be infinite.
ADVERTISEMENT
#3 21671358 21 Apr 2014 19:43

Bhuvanesh Nick Bhuvanesh Nick

Anonymous

Post #3
21671358 21 Apr 2014 19:43

bq). To change voltage instantaneously (infinite dV/dt) the current must be infinite.

i am weak in math.to change voltage instantaneously why the current should be infinite.please give detail explanation.thank you in advance
ADVERTISEMENT
#4 21671359 23 Apr 2014 03:25

Cameron M Cameron M

Anonymous

Post #4
21671359 23 Apr 2014 03:25

changing the current or voltage instantaneously means (dt=0approximately) i.e the slop (dv/dt or di/dt) goes to infility . then i(for the c) or v(for the inductor) should be infinite.
ADVERTISEMENT
#5 21671360 23 Apr 2014 03:58

Jed Darryl Anayron Jed Darryl Anayron

Anonymous

Post #5
21671360 23 Apr 2014 03:58

dv/dt is the change of the voltage with respect to time. Remember that capacitors are open when applied with a DC voltage. A DC voltage has dv/dt = 0, which means that there is no change in its voltage. Applying it in the equation i = C dV/dt, current would be zero. The contrary applies to inductors. Please check on the capacitor/inductor graphs for more info.
#6 21671361 23 Apr 2014 07:38

DAVID CUTHBERT DAVID CUTHBERT

Anonymous

Post #6
21671361 23 Apr 2014 07:38

Electronics is all about math. So, you might want to hit the books and learn some more math.
Create an account, log in here. You will receive points by participating in discussions.
Join this discussion.

Install Elektroda application

Didn't find an answer? Ask Artificial Intelligence (AI)

*I agree to send the question to OpenAI, Google LLC - owners of language models in order to prepare the best response. The companies may monitor and log information entered into the form.

*I agree to publicly display my question and answer. The question and answer will be publicly available to everyone. The process may take a few minutes. Upon completion, you will be redirected to the page with the answer.

Wait...(2min)

Reply | New topic

Report a violation of the law

Why Can't Voltage Change Instantly in a Capacitor or Current in an Inductor?

Didn't find an answer? Ask Artificial Intelligence (AI)