A major application of the diode is in the production of a dc voltage from an ac supply, ______ as rectification.
举一反三
- The effective value of ac voltage or current is（ ） A: The average value of a voltage or current B: DC equal to the AC thermal effect is defined as the effective value of AC C: voltage or current are 0.707 of their amplitudes D: closely related to the frequency of alternating current
- The major difference of a personal statement from an application letter is that ______.
- When a BJT is operating in the active region, the voltage drop from the base to the emitter VBE is approximately equal to the____ A: base bias voltage B: base current times the base resistor C: diode drop (about 0.7 V) D: emitter voltage
- 电力变换通常包括那几类？ A: AC/DC和DC/AC两大类。 B: AC/DC、DC/AC、DC/DC、AC/AC四大类。 C: AC/DC、DC/AC、DC/DC三大类。 D: DC/AC、DC/DC、AC/AC三大类。
- 逆变电路是一种（ ）变换电路。A、AC/AC B、DC/AC C、DC/DC D、AC/DC A: AC/AC B: DC/AC C: DC/DC D: AC/DC