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The essential basics of electricity

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Chap 1 - Quiz

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1. What does electric current correspond to?
An orderly movement of electrons in a conductor A zero potential difference A very high resistance A voltage applied between two points
2. What is the unit of measurement used to express electric current intensity?
Volt Ampere Watt Ohm
3. By which particle is electric charge mainly carried?
Protons Neutrons Free electrons Vacuum
4. In what unit is the quantity of electricity expressed?
Joule Watt Volt Coulomb
5. What does the potential difference (voltage) represent in an electrical circuit?
Energy per unit charge between two points The resistance in a circuit The flow of current in a wire The maximum current
6. What is voltage in an electrical circuit?
The resistance of a wire The energy dissipated The cause that drives current to flow The number of electrons in motion
7. What does electrical resistance oppose in a circuit?
Voltage Energy Electric charge The flow of current
8. How is electrical power calculated in a circuit?
P = U − I P = U/I P = U × I P = I/U
9. What is electric charge in a circuit?
Current Direct voltage Electrical power A quantity expressing the number of electrons moved
10. What happens in a simple electrical circuit when the voltage increases?
The current decreases The current increases The resistance disappears The charge becomes zero