举一反三
- When the input voltage to this circuit is 0.25 V, the output voltage is _______[img=286x136]18032342e7cff3b.png[/img] A: 10.0 V B: 5.0 V C: 3.0 V D: 1.5 V
- What is the output voltage of the following circuit?[img=368x247]18031c75256a8d7.jpg[/img] A: [img=113x21]18031c752dbaea0.png[/img] B: [img=113x21]18031c7535d319c.png[/img] C: [img=113x21]18031c753e78172.png[/img] D: [img=113x21]18031c754790b3a.png[/img]
- For the circuit shown, the open circuit voltage [img=22x17]1803a240f0baf58.png[/img] is[img=253x132]1803a240fcedc8e.png[/img] A: 8V B: 4V C: 10V D: 6V
- For the circuit shown, the open circuit voltage [img=24x22]1803a2436d68f8e.png[/img] is[img=348x254]1803a243790ab90.png[/img] A: 12V B: 24V C: 8V D: 6V
- For the circuit in the Figure, the voltage vo is ( )[img=493x266]1803a2be410baec.png[/img] A: -6V B: -5V C: -1.2V D: -0.2V
内容
- 0
In the circuit shown in Figure , the voltage U is ________[img=481x296]18031723660721c.jpg[/img] A: 2V B: -2V C: 6V D: -6V
- 1
When a BJT is biased in the cutoff region the collector-to-emitter voltage is typically equal to ( ). A: the emitter voltage B: the collector supply voltage C: 0.03 V D: the collector current times the collector resistor
- 2
Given that the magnetic circuit of DC electromagnet. The voltage U is constant . How will the Magnetic flux [img=13x19]1803a2fab6cb10e.png[/img] change when the air gap length increases ( ).[img=455x406]1803a2fac3677ca.jpg[/img] A: increase B: decrease C: remain unchanged D: not sure
- 3
Given that the magnetic circuit of AC electromagnet. The voltage U is constant . How will the Magnetic flux [img=13x19]1803a2fa8f20802.png[/img] change when the air gap length increases ( ).[img=455x406]1803a2fa9d5f73f.jpg[/img] A: increase B: decrease C: remain unchanged D: not sure
- 4
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