• 2022-06-04
    When the input voltage to this circuit is 0.25 V, the output voltage is (     ).[img=330x151]17a3dde427a4d5d.png[/img]
  • 1.5 V

    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