Podcast
Questions and Answers
An ammeter is used to measure __________.
An ammeter is used to measure __________.
current
What is the unit of measurement for resistance?
What is the unit of measurement for resistance?
Ohms
Which of the following statements is not true about measuring the resistance of a component that is connected in a circuit?
Which of the following statements is not true about measuring the resistance of a component that is connected in a circuit?
- Make sure the power supply is off.
- Make sure the power supply is on. (correct)
- Disconnect the component from the circuit.
- Use the ohmmeter.
Current in a __________ circuit is divided among the branches of the circuit.
Current in a __________ circuit is divided among the branches of the circuit.
As branches are added to a parallel circuit, the resistance __________.
As branches are added to a parallel circuit, the resistance __________.
A(n) __________ circuit is one in which there is more than one path for current to travel.
A(n) __________ circuit is one in which there is more than one path for current to travel.
Voltage is a(n) electrical __________.
Voltage is a(n) electrical __________.
The two ways to measure voltage are __________ and __________.
The two ways to measure voltage are __________ and __________.
A multimeter is a multipurpose device that can measure __________.
A multimeter is a multipurpose device that can measure __________.
To measure current through a component, the ammeter must be connected __________ the component.
To measure current through a component, the ammeter must be connected __________ the component.
If a wire has continuity, it __________.
If a wire has continuity, it __________.
Both analog and digital voltmeters measure __________.
Both analog and digital voltmeters measure __________.
A(n) __________ is used to measure resistance.
A(n) __________ is used to measure resistance.
In a parallel circuit with a constant voltage power supply, the voltage drop across each branch is __________.
In a parallel circuit with a constant voltage power supply, the voltage drop across each branch is __________.
10mA would be an example of __________ value.
10mA would be an example of __________ value.
Flashcards
What does an ammeter measure?
What does an ammeter measure?
A device used to measure electric current in a circuit.
Unit of Resistance
Unit of Resistance
The unit of electrical resistance, symbolized by the Greek letter omega (Ω).
Current in a Parallel Circuit
Current in a Parallel Circuit
In a parallel circuit, current is divided among the different paths or branches.
Resistance in Parallel Circuits
Resistance in Parallel Circuits
As more branches are added, the overall resistance of the parallel circuit decreases.
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What is a Parallel Circuit?
What is a Parallel Circuit?
A circuit that provides multiple paths for current to flow, as opposed to a single path in a series circuit.
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What is Voltage?
What is Voltage?
The electrical force that drives current through a circuit.
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How to Measure Voltage
How to Measure Voltage
Across a component and from a reference point (usually ground).
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What a Multimeter Measures
What a Multimeter Measures
Voltage, current, and resistance.
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Ammeter Connection
Ammeter Connection
An ammeter must be connected in series with the component to correctly measure the current flowing through it.
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What is Continuity?
What is Continuity?
Having a continuous, unbroken path for current to flow, indicated by very low resistance.
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Voltmeter Measures
Voltmeter Measures
Potential difference between two points in a circuit.
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What is an Ohmmeter?
What is an Ohmmeter?
A device used to measure electrical resistance.
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Voltage Drop in Parallel
Voltage Drop in Parallel
In a parallel circuit, the voltage drop across each branch is the same and equal to the source voltage.
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What is 10mA?
What is 10mA?
A typical value for electrical current.
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Electrical Measurements Overview
- An ammeter measures current in electrical circuits.
- The unit of measurement for resistance is ohms.
- Always ensure the power supply is off before measuring resistance to obtain accurate readings.
Circuit Types
- Current in a parallel circuit is divided among its branches.
- Adding more branches to a parallel circuit results in a decrease in resistance.
- A parallel circuit provides multiple paths for current flow.
Voltage Measurements
- Voltage represents the electrical force that drives current through a circuit.
- Two methods to measure voltage include measuring across a component and measuring from a reference point.
Multimeters and Measurement Techniques
- A multimeter can measure voltage, current, and resistance making it a versatile tool.
- To measure current through a component, connect the ammeter in series with that component.
- If a wire shows continuity, it indicates almost no resistance within it.
Voltmeters and Ohmmeters
- Both analog and digital voltmeters measure potential difference across components.
- An ohmmeter is specifically used to measure resistance in circuits.
Circuits and Voltage Drops
- In a parallel circuit with a constant voltage source, the voltage drop across each branch is equal to the power supply voltage.
- An example of a current value is 10mA.
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