A: the emitter voltage
B: the collector supply voltage
C: 0.03 V
D: the collector current times the collector resistor
举一反三
- When a BJT is in cutoff, the collector-to-emitter voltage is typically equal to _____ A: collector supply voltage B: collector current times collector resistor C: 0.3 Volts D: emitter voltage
- 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
- β is the ratio of _____. A: collector current to emitter current B: base current to collector current C: collector current to base current D: emitter current to collector current
- when a transistor is in the forward-active mode, the collector current is constant with a constant base current
- The function of direct current regulated power supply is to input an alternating current power of 220volts, so that it can output __________.( ) A: alternating current 200 volts voltage B: direct current 24 volts voltage C: direct current 200 volts voltage D: alternating current 24 volts voltage
内容
- 0
What is the “Energy Collector” in the conversation?
- 1
What does the ticket collector usually say when checking tickets?
- 2
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
- 3
The inductor voltage phase lags its current by 90 o, and the capacitor current lags its voltage by 90 o, is this conclusion true? [ ]. A: It's impossible. B: When the capacitance and inductance are nonlinear components. C: When inductance current and voltage, capacitance current and voltage are not related direction. D: Whenever.
- 4
The voltage meter and current meter on the main switchboard shows ( <br/>). A: phase voltage and phase current of generator B: line voltage and line current of generator C: line voltage and line current of crane D: line voltage and line current of shore power