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Choose the best answer.

Batteries produce _____.

direct current

a dielectric

a diode

alternating current



2) Choose the best answer.

When the electric potential in a generator shifts positive, then negative and back positive, _____ is created.

a dielectric

a diode

alternating current

direct current



3) Choose the best answer.

A device that serves as a gate allowing current to pass in one direction is _____.

conventional

a diode

direct current

a dielectric



4) Match with the correct unit of measure.
SI unit of current = 1 C/s

ampere

farad

joule

coulomb



5) Match with the correct unit of measure.
SI unit of electric charge; the amount of electric charge by a current of one amp in 1 second.

joule

coulomb

ampere

farad



6) Match with the correct unit of measure.
Unit of power = 1 joule per second

coulomb

ampere

joule

watt



7) Match with the correct unit of measure.
SI unit of capacitance the charge in coulombs that a capacitor will accept for the potential across it to change 1 volt.

coulomb

watt

ampere

farad



8) Match with the correct unit of measure.
SI unit of energy = work required to produce one watt of power for one second

ampere

watt

joule

coulomb



9) Match with the correct unit of measure.
Unit of electrical resistance = resistance between two points of a conductor when a constant potential difference of 1 volt, applied to these points, produces a current of 1 ampere in the conductor

watt

volt

farad

ohm



10) Match with the correct unit of measure.
Unit of electric potential 1 joule of energy per coulomb of charge, J/C

watt

farad

volt

ohm



11) Choose the best answer.

Current flowing from positive to negative is called _____ current.

a dielectric

conventional

a diode

direct current



12) Select two that apply.

(Double points) A heater uses 16.25 amps of current from a 120-volt line. What would the power in watts be?

0.687 amps

0

240 volts

1950 J/s

1950 watts



13) Choose the best answer.

(Double points) It takes 165 watts of power to run a computer connected to a 240-volt line. What are the number of amperes used in the current traveling to the computer?

240 volts

165 watts

0.687 amps

1950 watts



14) Choose the best answer.

The I2R loss in a conductor is due to current and _____.

resistance

coulomb

conventional

watt



15) Choose the best answer.

Electrical power companies charge for energy they provide in units of _____.

kilowatt-minutes

kilowatt-hours

kilowatt-seconds

watt-seconds



16) Choose the best answer.

Transformers only operate on _____ current.

alternating

coulomb

resistance

conventional

1 answer

Here are the best answers for each question:

  1. Batteries produce _____.
    direct current

  2. When the electric potential in a generator shifts positive, then negative and back positive, _____ is created.
    alternating current

  3. A device that serves as a gate allowing current to pass in one direction is _____.
    a diode

  4. SI unit of current = 1 C/s.
    ampere

  5. SI unit of electric charge; the amount of electric charge by a current of one amp in 1 second.
    coulomb

  6. Unit of power = 1 joule per second.
    watt

  7. SI unit of capacitance the charge in coulombs that a capacitor will accept for the potential across it to change 1 volt.
    farad

  8. SI unit of energy = work required to produce one watt of power for one second.
    joule

  9. Unit of electrical resistance = resistance between two points of a conductor when a constant potential difference of 1 volt, applied to these points, produces a current of 1 ampere in the conductor.
    ohm

  10. Unit of electric potential 1 joule of energy per coulomb of charge, J/C.
    volt

  11. Current flowing from positive to negative is called _____ current.
    conventional

  12. A heater uses 16.25 amps of current from a 120-volt line. What would the power in watts be?
    1950 watts (Power = Voltage x Current = 120 V x 16.25 A)

  13. It takes 165 watts of power to run a computer connected to a 240-volt line. What are the number of amperes used in the current traveling to the computer?
    0.687 amps (Current = Power / Voltage = 165 W / 240 V)

  14. The I2R loss in a conductor is due to current and _____.
    resistance

  15. Electrical power companies charge for energy they provide in units of _____.
    kilowatt-hours

  16. Transformers only operate on _____ current.
    alternating