Podcast
Questions and Answers
A device that converts electrical energy to another form of energy is called a ______.
A device that converts electrical energy to another form of energy is called a ______.
load
A ______ is a path for electron flow in a circuit.
A ______ is a path for electron flow in a circuit.
circuit
An electrochemical cell generates electricity directly from a chemical reaction with a ______.
An electrochemical cell generates electricity directly from a chemical reaction with a ______.
fuel
Potential Difference is measured in ______.
Potential Difference is measured in ______.
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A ______ can turn the circuit on and off by closing or opening the circuit.
A ______ can turn the circuit on and off by closing or opening the circuit.
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Ohm’s Law expresses the relationship between voltage, current, and resistance as ______ = IR.
Ohm’s Law expresses the relationship between voltage, current, and resistance as ______ = IR.
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A ______ is a combination of electrochemical cells.
A ______ is a combination of electrochemical cells.
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Electrons push or repel nearby electrons while traveling through a ______.
Electrons push or repel nearby electrons while traveling through a ______.
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Electrical current is measured with an ______ using amps.
Electrical current is measured with an ______ using amps.
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Direct Current (DC) flows of electrons in one ______.
Direct Current (DC) flows of electrons in one ______.
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The flow of electrons is from negative to ______ terminal.
The flow of electrons is from negative to ______ terminal.
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Resistance is the degree to which a substance opposes the flow of electric ______.
Resistance is the degree to which a substance opposes the flow of electric ______.
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V = I x ______ is known as Ohm’s Law.
V = I x ______ is known as Ohm’s Law.
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In a series circuit, there is ______ path for electrons to flow.
In a series circuit, there is ______ path for electrons to flow.
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Adding resistors in a parallel circuit decreases the total ______ of the circuit.
Adding resistors in a parallel circuit decreases the total ______ of the circuit.
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A ______ is any material that slows current flow.
A ______ is any material that slows current flow.
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Study Notes
Circuit Components
- Load: A device that converts electrical energy to another form of energy (e.g., light bulb, motor, fan).
- Source: Provides electrical energy (e.g., battery).
- Cell: A component that converts chemical energy into electrical energy.
- Resistor: A component that opposes the flow of current, converting electrical energy into other forms (heat or light).
- Switch: A device to open or close a circuit, controlling the flow of electricity.
- Symbols: Specific diagrams used to represent each component in circuit diagrams.
Drawing Combination Circuits
- Combination circuits include loads connected in both series and parallel arrangements.
- Understanding series and parallel circuit rules is needed to analyze a circuit with both types
Current and Potential Difference
Definitions
- Current (I): The measure of the amount of electric charge passing a point in a circuit, measured in amperes (A).
- Potential Difference (Voltage, V): The difference in electrical potential energy between two points in a circuit, measured in volts (V).
Series Circuits
- Current: The same current flows through each component.
- Voltage: The total voltage across the components is equal to the sum of the voltage drops across each individual component.
Parallel Circuits
- Voltage: The voltage across each branch is the same as the source voltage.
- Current: The total current is the sum of the currents in each branch.
Taking Readings from Ammeters and Voltmeters
- Ammeter: Measures current; connected in series.
- Voltmeter: Measures potential difference; connected in parallel across the component.
Determining Voltage and Current in Combination Circuits
- Requires applying knowledge of series and parallel circuit rules.
Using Ohm's Law (V = IR)
- Relates voltage (V), current (I), and resistance (R).
- Used to calculate any of V, I, or R if the others are known.
Electrochemical Cells
- Battery: A combination of electrochemical cells, providing electrical energy.
- Electrochemical Cells: Convert chemical energy into electrical energy.
- Electrolyte: Conducts electricity in a cell due to ions.
- Wet Cell: Liquid electrolyte (e.g., car battery).
- Dry Cell: Electrolyte paste (e.g., typical household battery).
Circuit Types
- Series Circuit: A single path for electron flow.
- Parallel Circuit: Multiple paths for electron flow.
Additional Concepts
- Direct Current (DC): Electrons flow in one direction (e.g., batteries).
- Alternating Current (AC): Electrons flow back and forth (e.g., generators).
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Description
Test your understanding of various circuit components, including loads, sources, and resistors. This quiz also covers the analysis of combination circuits and the concepts of current and potential difference. Perfect for students looking to strengthen their electrical engineering knowledge.
