Questions and Answers
What is the main function of an ammeter in an electric circuit?
Measure electric current
In which configuration is a voltmeter typically connected in an electric circuit?
Parallel
What work is done when carrying one coulomb of charge from one point to another in a current-carrying conductor?
1 Joule
What is the total effective resistance of resistors connected in parallel?
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What happens in a series connection if any component fails to work?
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Why is it not possible to connect a bulb and a heater in series?
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What converts the rest of the energy from a battery into heat in an electric circuit?
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What is the SI unit of electrical energy?
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When measuring electric current, how should an ammeter be connected in the circuit?
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What happens to the voltage across a resistor if the resistance decreases?
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What relationship does the formula P = VI represent in an electric circuit?
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Study Notes
Electric Circuits
- The main function of an ammeter in an electric circuit is to measure electric current.
Voltmeter Connection
- A voltmeter is typically connected in parallel in an electric circuit.
Work Done in a Conductor
- One joule of work is done when carrying one coulomb of charge from one point to another in a current-carrying conductor.
Resistors in Parallel
- The total effective resistance of resistors connected in parallel is less than the individual resistances.
Series Connection Failure
- If any component fails to work in a series connection, the entire circuit fails to work.
Series Connection Limitations
- A bulb and a heater cannot be connected in series because they have different current requirements.
Energy Conversion
- The internal resistance of the battery converts the rest of the energy from a battery into heat in an electric circuit.
SI Unit of Electrical Energy
- The SI unit of electrical energy is the joule (J).
Ammeter Connection
- When measuring electric current, an ammeter should be connected in series in the circuit.
Voltage and Resistance
- If the resistance decreases, the voltage across a resistor increases.
Power Formula
- The formula P = VI represents the relationship between power (P), voltage (V), and current (I) in an electric circuit.
