# Digital Electronics - Multivibrators and 555 Timer - Discussion

### Discussion :: Multivibrators and 555 Timer - General Questions (Q.No.2)

2.

When a capacitor charges:

 [A]. the voltage across the plates rises exponentially [B]. the circuit current falls exponentially [C]. the capacitor charges to the source voltage in 5×RC seconds [D]. all of the above

Answer: Option D

Explanation:

No answer description available for this question.

 Vijay said: (Jan 31, 2011) hello this is vijay, capacitor charges but time constant..is it 5*rc?

 Yadwinder Singh said: (May 10, 2012) Time constant is RC seconds in which it reaches 63% of Max. voltage(Supply Voltage)

 Yadwinder Singh said: (May 10, 2012) In 5RC it is nearly equal to supply voltage. To get same voltage it requires infinite time.

 Pavithra said: (Nov 18, 2016) When the circuit current falls exponentially?

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