implement an external ( ) or
data bus.
A: voltage
B: current
C: address
D: resistance
举一反三
- The resistance value is infinite, the current passing through the resistance is always zero, and the voltage depends on the external circuit, then it is called as the short circuit state.
- Name the three types of bus which are used when external memory is connected to the 8051.( ) A: Address bus B: Control bus C: Data bus D: Enable bus
- 2.Whichoftheelectricalpropertieslistedwillalwaysbethesameforeachcomponentinaparallelcircuit A: Impedance B: Current C: Resistance D: Voltage
- Which<br/>of the following devices may be used to de-multiplex the lower<br/>address bus from multiplexed address-data bus of MCS-51?(). A: 74373 B: 74245 C: 74139 D: 74139
- 1.Inaseriescircuit,whichvaluewillremainunchangedatallplacesinthecircuit. A: Voltage B: Current C: Resistance D: Inductance
内容
- 0
The unit of _____________ is the volt. A: current B: voltage C: resistance D: efficiency
- 1
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
- 2
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
- 3
100%<br/>Protection for generator stator single phase earth fault() A: zero<br/>sequence voltage protection B: third<br/>harmonic voltage protection C: zreo<br/>sequence current
- 4
In<br/>large quantity production()is<br/>widely used。 A: general-purpose jigs B: special purpose jigs C: group jigs D: modular fixture