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Electric power - Quiz
Contributed by: Abbott
  • 1. What is the SI unit of electric power?
A) Ampere
B) Joule
C) Volt
D) Watt
  • 2. How is a watt defined?
A) One joule per coulomb
B) One volt per ampere
C) One joule per second
D) One coulomb per second
  • 3. What is a gigawatt equivalent to?
A) A million watts
B) A trillion watts
C) A thousand watts
D) A billion watts
  • 4. What letter is used to represent electric power?
A) I
B) V
C) P
D) W
  • 5. Which of the following is a source of electric power besides generators?
A) Electric batteries
B) Electrical grids
C) Transmission lines
D) Electrical components
  • 6. What is the formula for electric power (P) in relation to voltage (V) and current (I)?
A) P = V / I
B) P = V × I
C) P = I / V
D) P = V + I
  • 7. What does the variable W represent in the power equation?
A) Wattage
B) Work in joules
C) Voltage in volts
D) Water flow
  • 8. In circuits, what are the actual mobile charge carriers?
A) Positrons
B) Protons
C) Electrons
D) Neutrons
  • 9. What is the direction of conventional current defined as?
A) The direction that positive charge flows
B) The direction of magnetic flux
C) The direction that electrons flow
D) The direction of gravity
  • 10. What does a flow of positive charge in one direction represent regarding negative charge?
A) An equal flow of negative charge in the opposite direction
B) A faster flow of negative charge in the same direction
C) No movement of negative charge
D) An equal flow of negative charge in the same direction
  • 11. How is electric power generally described in common parlance?
A) The mass of electrical components
B) The chemical reaction in batteries
C) The speed of light
D) Production and delivery of electrical energy
  • 12. What is the colloquial term for 'electric power in watts'?
A) Current
B) Charge
C) Voltage
D) Wattage
  • 13. What are three common applications of electric power mentioned in the text?
A) Sound, pressure or volume
B) Motion, light or heat
C) Gravity, force or friction
D) Cooling, freezing or condensing
  • 14. What is a megawatt?
A) A million watts
B) A billion watts
C) A thousand watts
D) A hundred watts
  • 15. How is voltage between two terminals defined?
A) The number of watts produced
B) The rate of electron flow
C) The time taken to complete a circuit
D) Work required to move a unit charge against the electric field
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