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The following circuit has a source voltage Vs as shown in the graph. The current through the circuit is also shown.
The element connected between a and b could be
Correct Option: A
When a forward biased diode is reverse biased, initially it conducts due to the flow of stored charges. After some ti me it goes int o nonconducting state.
Alternately
For 0 < t < 100 ms, Vs = 0,
is = 0; diode not conduct
For 100 < t < 200 ms, Vs = 10V,
| i = | = 1 mA ; diode conducts | |
| 10K |
For 200 < t < 300 ms, Vs = – 10V, i = 0; diode reverse bias
current is zero after small reverse recovery time.
For 300 < t < 400 ms, Vs = 0;
i = 0; diode not conduct
