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Electrics Information test
30問 • 1年前
  • ユーザ名非公開
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    問題一覧

  • 1

    How much current will flow in a circuit that has 60 mV applied to a 15 KS resistance?

    0.004 mA

  • 2

    What voltage is required for 30 A to flow through a 60 kS resistance?

    1.8 mv

  • 3

    What is the current in the 20-ohm resistor?

    1 amp

  • 4

    Given the image below, which shell is the valence shell in a copper Atom?

    the fourth

  • 5

    Which is the collector in the transistor symbol below?

    2

  • 6

    Current can be expressed in:

    milliamperes

  • 7

    A circuit with a flowing current in it can be assumed to be

    closed

  • 8

    Which of the following symbols represents a polarized capacitor?

    C

  • 9

    What is created When a P-type material is joined with an N-type material?

    a diode

  • 10

    Which switch, if flipped, would not close the circuit in the diagram Shown?

    S4

  • 11

    Given a circuit with a single resistor, adding two more resistors to the circuit, both with the same resistance value as the original resistor, one in parallel with the original resistor and one in series with them both, will cause the overall resistance to

    definitely increase

  • 12

    Which of the following would not increase the rate of direct current flow, 1, through a conductor?

    adding an inductor to the circuit (in series)

  • 13

    A circuit includes three 2 s resistors wired in parallel. What is their effective resistance?

    2/3

  • 14

    Why is copper favored over other conducting materials like aluminum and silver?

    Copper has low resistance relative to its cost.

  • 15

    A 6 V battery provides power to a flashlight whose 10 W light bulb is the only load in the circuit. What is the amount of current flow through the flashlight?

    1.67 A

  • 16

    A 2.5 V battery is used to power a cordless phone. 20. An ammeter shows the current flow is 30 A through the ora phone when it is on. How much power does the phone Wh use?

    75 W

  • 17

    A shop vac is plugged into a 120 V generator. Given a total current flow of 15 A, what must the total resistance of the vacuum cleaner be?

    8

  • 18

    Two identical resistors are wired in parallel in a circuit. The voltage drop across these resistors is 18 volts, and the total current in the circuit is 6 amps. What is the resistance of either resistor?

    6

  • 19

    Which of the following is one of the reasons neighborhoods are connected to the power grid via electrical substations instead of directly wired into long-distance power lines?

    The substation transforms the efficient high-voltage power coming off the lines to a safer, lower value for household use.

  • 20

    A fixed resistor has a color band pattern of Black, orange, and orange. What is its resistance?

    3000 ohms

  • 21

    Given the following DC circuit, which has been open for some time, what will happen after the switch is closed?

    The total current flow will be smaller when the lamp first lights, then increase dramatically.

  • 22

    A European traveler brings his hair dryer to the United States. The specifications on the small appliance say it draws 10 amps when on a standard household circuit, which is 220 volts in Europe. What will it draw if connected directly to a U.S. power source of 110 volts?

    5 amps

  • 23

    A portable air compressor converts electric energy to the potential energy of pressurized air. A mechanics student calculates the total energy of the pressurized air at about 800,000 J. If it took 400 seconds to fully pressurize the machine, what must be the electric power rating of the compressor?

    2000W

  • 24

    Given a lamp wired in a simple AC household circuit, which of the following will cause the light to dim the most?

    An inductor wired in series with the lamp

  • 25

    In the circuit diagram pictured, where the two lamps have identical loads, what will be the effect of closing the switch?

    L1 will light up, and L2 will remain at the same brightness; the power draw on the battery will double.

  • 26

    A simple parallel circuit with resistances of 2.5 2 and 5.0 ., respectively, will have:

    twice as much current in the 2.5 . resistor

  • 27

    Plugs are often differently shaped in different countries to prevent foreign electronics from drawing IC on an electric grid they weren't designed for. What would happen if a device designed for a 150-volt source were forced into a plug providing 240 volts?

    The device might burn out due to higher currents.

  • 28

    Which one of the following circuit components will least affect the flow of an alternating current?

    B

  • 29

    In the wiring diagram below, the fuse is rated at 0.4 A. The lamps and resistor have the resistances given, and the fuse has no resistance. What will happen when the switch is closed?

    L2 only will stay lit.

  • 30

    A technician wants to measure the total current in the circuit described in the wiring diagram shown. If she attaches ammeters just after the 10 S and 20 g resistors, the total current will be equal to:

    the sum of the values on each ammeter

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    問題一覧

  • 1

    How much current will flow in a circuit that has 60 mV applied to a 15 KS resistance?

    0.004 mA

  • 2

    What voltage is required for 30 A to flow through a 60 kS resistance?

    1.8 mv

  • 3

    What is the current in the 20-ohm resistor?

    1 amp

  • 4

    Given the image below, which shell is the valence shell in a copper Atom?

    the fourth

  • 5

    Which is the collector in the transistor symbol below?

    2

  • 6

    Current can be expressed in:

    milliamperes

  • 7

    A circuit with a flowing current in it can be assumed to be

    closed

  • 8

    Which of the following symbols represents a polarized capacitor?

    C

  • 9

    What is created When a P-type material is joined with an N-type material?

    a diode

  • 10

    Which switch, if flipped, would not close the circuit in the diagram Shown?

    S4

  • 11

    Given a circuit with a single resistor, adding two more resistors to the circuit, both with the same resistance value as the original resistor, one in parallel with the original resistor and one in series with them both, will cause the overall resistance to

    definitely increase

  • 12

    Which of the following would not increase the rate of direct current flow, 1, through a conductor?

    adding an inductor to the circuit (in series)

  • 13

    A circuit includes three 2 s resistors wired in parallel. What is their effective resistance?

    2/3

  • 14

    Why is copper favored over other conducting materials like aluminum and silver?

    Copper has low resistance relative to its cost.

  • 15

    A 6 V battery provides power to a flashlight whose 10 W light bulb is the only load in the circuit. What is the amount of current flow through the flashlight?

    1.67 A

  • 16

    A 2.5 V battery is used to power a cordless phone. 20. An ammeter shows the current flow is 30 A through the ora phone when it is on. How much power does the phone Wh use?

    75 W

  • 17

    A shop vac is plugged into a 120 V generator. Given a total current flow of 15 A, what must the total resistance of the vacuum cleaner be?

    8

  • 18

    Two identical resistors are wired in parallel in a circuit. The voltage drop across these resistors is 18 volts, and the total current in the circuit is 6 amps. What is the resistance of either resistor?

    6

  • 19

    Which of the following is one of the reasons neighborhoods are connected to the power grid via electrical substations instead of directly wired into long-distance power lines?

    The substation transforms the efficient high-voltage power coming off the lines to a safer, lower value for household use.

  • 20

    A fixed resistor has a color band pattern of Black, orange, and orange. What is its resistance?

    3000 ohms

  • 21

    Given the following DC circuit, which has been open for some time, what will happen after the switch is closed?

    The total current flow will be smaller when the lamp first lights, then increase dramatically.

  • 22

    A European traveler brings his hair dryer to the United States. The specifications on the small appliance say it draws 10 amps when on a standard household circuit, which is 220 volts in Europe. What will it draw if connected directly to a U.S. power source of 110 volts?

    5 amps

  • 23

    A portable air compressor converts electric energy to the potential energy of pressurized air. A mechanics student calculates the total energy of the pressurized air at about 800,000 J. If it took 400 seconds to fully pressurize the machine, what must be the electric power rating of the compressor?

    2000W

  • 24

    Given a lamp wired in a simple AC household circuit, which of the following will cause the light to dim the most?

    An inductor wired in series with the lamp

  • 25

    In the circuit diagram pictured, where the two lamps have identical loads, what will be the effect of closing the switch?

    L1 will light up, and L2 will remain at the same brightness; the power draw on the battery will double.

  • 26

    A simple parallel circuit with resistances of 2.5 2 and 5.0 ., respectively, will have:

    twice as much current in the 2.5 . resistor

  • 27

    Plugs are often differently shaped in different countries to prevent foreign electronics from drawing IC on an electric grid they weren't designed for. What would happen if a device designed for a 150-volt source were forced into a plug providing 240 volts?

    The device might burn out due to higher currents.

  • 28

    Which one of the following circuit components will least affect the flow of an alternating current?

    B

  • 29

    In the wiring diagram below, the fuse is rated at 0.4 A. The lamps and resistor have the resistances given, and the fuse has no resistance. What will happen when the switch is closed?

    L2 only will stay lit.

  • 30

    A technician wants to measure the total current in the circuit described in the wiring diagram shown. If she attaches ammeters just after the 10 S and 20 g resistors, the total current will be equal to:

    the sum of the values on each ammeter