For those not having it handy:
An Si diode used as a 1/2 wave rectifier and is drawn in series with a 220VAC source. The 220 VAC Source in parallel with a 50 microfarad Cap The cap is drawn after the Diode. The minimum PIV (V) rating necessary to avoid reverse breakdown is most nearly A.)220, B)310, C)440 or D) 620
Answer is 620 with the soultion explained as " Since the Cap charges to 220 x1.4 V and holds that charge while the supply goes to its negative max -220x1.4 the PIV must be 440x1.4=616.
This seems relatively harmless, can someone walk me through the solution, offer a better explanation? Where does 1.4 Volts come from?
John
An Si diode used as a 1/2 wave rectifier and is drawn in series with a 220VAC source. The 220 VAC Source in parallel with a 50 microfarad Cap The cap is drawn after the Diode. The minimum PIV (V) rating necessary to avoid reverse breakdown is most nearly A.)220, B)310, C)440 or D) 620
Answer is 620 with the soultion explained as " Since the Cap charges to 220 x1.4 V and holds that charge while the supply goes to its negative max -220x1.4 the PIV must be 440x1.4=616.
This seems relatively harmless, can someone walk me through the solution, offer a better explanation? Where does 1.4 Volts come from?
John