• 2021-04-14
    Ohm’s Law states that current equals voltage divided by resistance. Current increases with the increase in voltage. Current decreases with the increase in resistance.
  • 内容

    • 0

      In a linear regulator, the purpose of using the power transistor is to ( ). A: Increase output voltage B: Increase output current

    • 1

      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.

    • 2

      When replacing a power supply, what MUST the technician observe?() A: voltage B: current C: wattage D: resistance

    • 3

      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

    • 4

      Digital multi-meter cannot measure ( ) when the measured circuit is working. A: voltage B: current C: resistance D: None of the above