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Questions and Answers
What defines a closed loop in an electrical circuit?
What defines a closed loop in an electrical circuit?
What happens to the light bulbs in an open loop?
What happens to the light bulbs in an open loop?
What is the conventional direction of current flow?
What is the conventional direction of current flow?
Which statement accurately describes the difference between electron flow and conventional current?
Which statement accurately describes the difference between electron flow and conventional current?
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What is the unit of measurement for electrical current?
What is the unit of measurement for electrical current?
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Which of the following best describes conductors?
Which of the following best describes conductors?
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What role does a compass play in an electrical circuit?
What role does a compass play in an electrical circuit?
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Which of these materials acts as an insulator?
Which of these materials acts as an insulator?
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Study Notes
Castle Electricity - Section 1
- Closed loop: All batteries, bulbs, and wires are connected. The light bulbs light.
- Open loop: A break in the wires causes the bulbs to not light.
- Compass: Measures current and magnetic fields in wires. The amount of deflection in a compass is the same throughout a wire and reverses if the leads are reversed.
- Circuit: A closed loop of electrical components creating a continuous path. A battery causes something (though unseen) to move through the wires.
- Conventional current: Charges leave the positive (+) end of the battery, travel through the wire(s) and re-enter at the negative (-) end, following this established direction. This is the historically used and widely accepted convention.
- Electron flow: Electrons actually move from the negative (-) end of the battery to the positive (+) end. This is the actual movement of charge.
Electricity Concepts
- Electron flow: Electrons flow from the negative (-) terminal to the positive (+) terminal of a voltage source.
- Conventional current: Current flows from the positive (+) terminal to the negative (-) terminal.
- Current: The number of electrons passing through a conductor per second, measured in amperes (amps).
- Conductor: A material that allows electric current to flow easily (metals, except graphite).
Light Bulbs
- Flow: The electric current flows in a light bulb from one end (threaded or tip) and flows to the filament, then back to the other end.
- Gas: The gas inside (usually argon) allows the filament to light up.
- Filament: The filament's atoms absorb energy from the electricity and jump to higher energy levels. Their return to lower energy levels emits light.
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Description
This quiz covers fundamental concepts of electricity, including closed and open loops in circuits, the flow of electricity, and the distinction between conventional current and electron flow. Test your understanding of how electric circuits function and the components involved in measuring electrical characteristics.
