We know that the capacitive reactance is 1/(2*pi*f*c)... Given that the capacitor is free from a source... So frequency applied for that capacitor is 0... So 1/(2*pi*0*c)=infinity...

Shaan said:
(Jun 24, 2012)

But Capacitor at instant t=0 - works like a short ? Then As per transient analysis it should move from 0 to infinity.

Gayu said:
(Jan 16, 2014)

At a given condition, if the capacitor was charged it makes infinity, else zero. It depends upon the charge.

Urajanr said:
(Apr 25, 2016)

That's why the best is to use LCR where some level of frequency is pumped in to get the correct reading.

Archana said:
(Dec 13, 2017)

Actually, we know capacitive reactance is 1/2*π*f*c. Here applied frequency is zero. So capacitive reactance is infinity.

Shadan said:
(Mar 15, 2018)

Capacitor open means circuit open then resistance infinity so ohmmeter read infinute resistance.

Zero said:
(Mar 26, 2019)

Infinity resistance because of dielectric metirial used in capacitor.

Meow said:
(Dec 9, 2019)

It should be from zero to infinity (option C). At time=inf is only the time your Xc would equal to infinite.

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