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Flashcards on Direct Current Circuits
Click on the flashcard to see the answer
What is direct current (DC)?
Electric current that flows in one direction only.
What is an electric circuit?
A closed loop that allows electrons to flow.
What is the symbol for a direct current source?
A straight line with a circle.
What is the unit for electric current?
Ampere (A).
What is the function of a resistor in a circuit?
To limit the flow of current.
What is the formula for calculating voltage?
Voltage = Current x Resistance.
What is the purpose of a switch in a circuit?
To open or close the circuit.
What is the role of a battery in a DC circuit?
To provide the source of direct current.
What is Ohm's Law?
The relationship between voltage, current, and resistance.
What is the purpose of an ammeter?
To measure electric current in a circuit.
What is the function of a diode in a DC circuit?
To allow current flow in one direction only.
What happens to the brightness of a bulb when resistance increases in a circuit?
The bulb becomes dimmer.
What is the purpose of a fuse in a DC circuit?
To protect the circuit from excessive current.
What is the relationship between voltage and current in a circuit?
Directly proportional.
What is the role of a voltmeter?
To measure voltage in a circuit.
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Test Your Knowledge
What is direct current (DC)?
Electric current that flows in one direction only.
Electric current that flows in both directions.
Electric current that alternates its direction.
Electric current that does not flow.
Check Answers
What is the unit for electric current?
Watt
Ampere (A)
Volt
Ohm
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What is the purpose of a switch in a circuit?
To open or close the circuit.
To increase the voltage.
To measure the current.
To store electric energy.
Check Answers
What is Ohm's Law?
The relationship between energy and power.
The relationship between voltage and resistance.
The relationship between voltage, current, and resistance.
The relationship between voltage and current.
Check Answers
What is the function of a diode in a DC circuit?
To increase voltage.
To allow current flow in one direction only.
To measure current.
To store electric energy.
Check Answers
What happens to the brightness of a bulb when resistance increases in a circuit?
The bulb becomes brighter.
The bulb becomes dimmer.
The bulb remains the same brightness.
The bulb is turned off.
Check Answers
What is the purpose of a fuse in a DC circuit?
To protect the circuit from excessive current.
To increase the voltage.
To measure the current.
To store electric energy.
Check Answers
What is the relationship between voltage and current in a circuit?
Directly proportional.
Inversely proportional.
Unrelated.
Varies unpredictably.
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What is the role of a voltmeter?
To increase the voltage.
To measure voltage in a circuit.
To measure the current.
To protect the circuit.
Check Answers
What is the basic unit of electric charge?
Watt
Ampere
Volt
Coulomb
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