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