Electrical Engineering - Time Response of Reactive Circuits - Discussion
Discussion Forum : Time Response of Reactive Circuits - General Questions (Q.No. 16)
16.
In an RC differentiator, responding to repetitive pulses, the average value of the output
Discussion:
4 comments Page 1 of 1.
Lokeswari Saki said:
9 years ago
How it become zero?
The answer should be B.
The answer should be B.
Bhanu said:
9 years ago
YES, the answer is option B.
Kamlesh ahir said:
9 years ago
Zero? How?
Sewak said:
9 years ago
Because it is differentiator RC circuit ( having output across the resistor).
In differentiator, while the signal (pulse, step) at peak, the capacitor charges (as per time constant RC) and a later positive (without sign change) voltage appear across the resistor.
However, when the signal goes to zero, the capacitor discharges sending negative voltage (opposite sign) across the resistor.
The average is the sum of one total cycle/2. As sum will be zero, the average value of the output is also Zero.
In differentiator, while the signal (pulse, step) at peak, the capacitor charges (as per time constant RC) and a later positive (without sign change) voltage appear across the resistor.
However, when the signal goes to zero, the capacitor discharges sending negative voltage (opposite sign) across the resistor.
The average is the sum of one total cycle/2. As sum will be zero, the average value of the output is also Zero.
(1)
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