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Electricity (Grade 8)

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Electricity is the movement of                .
  1. molecules
  2. electrons
  3. atoms
  4. neutrons
Alternating current changes the                 of the current flow.
  1. direction
  2. amount
  3. strength
  4. voltage
                    flows in only one direction through a wire.
  1. Alternating current
  2. Direct current
  3. Voltage
  4. Electric current
Which of the following devices produces electric current?
  1. compass
  2. electric fan
  3. generator
  4. motor
Electric current should pass through a                       after being transmitted by a power plant and before it enters your home.
  1. turbine
  2. step-down transformer
  3. step-up transformer
  4. generator
What is static electricity?
  1. electricity produced by friction
  2. the energy of motion
  3. the path along which electrons flows
  4. all of above
Which of the following is the unit of measurement for electric potential?
  1. ohm
  2. volt
  3. watt
  4. ampere
A coulomb measures electrical                .
  1. power
  2. charge
  3. current
  4. resistance
Your local power company charges 20 cents per kilowatt-hour. Over the course of a month, you use a lamp with a 100-watt light bulb for 15 hours. How much will it cost to use your lamp that month?
  1. $0.20
  2. $0.30
  3. $2.00
  4. $3.00
Which image would represent a resistor in an electrical schematic?
  1. Connecting Wire
  2. Switch Closed
  3. Switch Open
  4. Resistor
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