A: Rated voltage 2KV, rated current 10A
B: Rated voltage 2KV, rated current 1000A
C: Rated voltage 10KV, rated current 1KA
D: Rated voltage 10KV, rated current 10KA
举一反三
- If the patient rated the pain as 7 out of 10, it means he had a severe pain.
- eBay平台中达成Top rated plus 后有机会获得成交费10%减免的优惠。（ ）
- 1.People'screditworthiness can be rated through their social networking relationships.
- 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
- 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
The<br/>common-base amplifier has _()()()__. A: voltage gain, current gain, and power gain B: voltage gain and power gain, but no current gain C: current gain and power gain, but no voltage gain D: current gain and voltage gain, but no power gain
- 1
A transistor is a ( )operated device. A: voltage B: current C: both voltage and current D: none of the above
- 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
In which year was the United States rated No 1 interms of production capacity in the world A: 1920 B: 1950 C: 1945 D: 1960