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  1. The unit for current is
Aamperes
Bvolts
Cohms

  1. The unit for resistance is
Aamperes
Bvolts
Cohms

  1. The unit for electromotive force is
Aamperes
Bvolts
Cohms

  1. Electricity is the flow of
Aenergy
Belectrons
Celectromotive force

  1. An example of an electric insulator is
Asteel.
Bwater.
Cdry air.
Daluminum.

  1. Properties that affect the resistance of a material include its
Awidth.
Blength.
Ctemperature.
Dall of the above

  1. If a wire with a resistance of 4 ohms is connected to a 12-volt battery, how much current is flowing through the wire?
A48 amps
B16 amps
C4 amps
D3 amps

  1. Batteries produce electrical energy by
Amoving electrodes.
Bchemical reactions.
Cthermal transfer.
Dnuclear fusion.

  1. Which of the following materials is an electric conductor?
Acopper
Brubber
Cplastic
Dwood

Verified Answer :

diene
  1. A. The SI unit for current is the ampere.
    2. C. The unit for resistance = ohm.
    3. B. EMF is measured in volts.
    4. B. Electric current is the flow of charged particles, i.e. electrons.
    5. B or C. All other answers are metals.
    6. C. The dimensions of a material don't affect its resistance.
    7. D. Ohm's law: current = voltage / resistance, 12/4 = 3.
    8. B. Batteries transform chemical energy into electrical energy.
    9. A. Metals are generally good conductors.