Hi,
iam not able get the solution for this. of course it seems simple, but i dont have dat much idea over this.
The circuit of figure uses two Zener diodes each rated at 15v, 200mA. If the
circuit is connected to a 45volt unregulated supply, determine
(i) the regulated o/p vg (ii) the value of series . . . . resistance R.
My analysis:
-> As the load resistance is parellel to the zeners (zener voltage = 15+15 = 30V) i found the load current = 30/200 A (0.15A).
->The current through the zeners is 200ma (0.2A)
-> so, the current through the series resistor is 0.2+0.15 = 0.35A
-> As the zeners are providing a potential diffrnce of 30V, 15V should drop at the series resistance.
-> so the series resistor value is R = 15/0.35 = 42.85 OHM
Is my analysis correct?
iam not able get the solution for this. of course it seems simple, but i dont have dat much idea over this.
The circuit of figure uses two Zener diodes each rated at 15v, 200mA. If the
circuit is connected to a 45volt unregulated supply, determine
(i) the regulated o/p vg (ii) the value of series . . . . resistance R.
My analysis:
-> As the load resistance is parellel to the zeners (zener voltage = 15+15 = 30V) i found the load current = 30/200 A (0.15A).
->The current through the zeners is 200ma (0.2A)
-> so, the current through the series resistor is 0.2+0.15 = 0.35A
-> As the zeners are providing a potential diffrnce of 30V, 15V should drop at the series resistance.
-> so the series resistor value is R = 15/0.35 = 42.85 OHM
Is my analysis correct?
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