What is the primary function of a resistor in an electrical circuit?

The Role of Resistors in Electrical Circuits and Ohm's Law

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Physics, Science, Mathematics
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9th - 12th Grade
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Hard

Patricia Brown
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
To store electrical energy
To increase the voltage
To limit the flow of electric current
To convert electrical energy into light
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which analogy is used to explain the function of a resistor?
A car engine
A water flow through a tube
A wind turbine
A solar panel
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
According to Ohm's Law, how is resistance calculated?
Voltage multiplied by current
Voltage plus current
Voltage divided by current
Current divided by voltage
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a simple circuit with a 2-volt source and a desired current of 4 amps, what should the resistance be?
2 ohms
0.5 ohms
4 ohms
8 ohms
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is a resistor used in an LED circuit?
To change the color of the LED
To increase the brightness of the LED
To prevent the LED from burning out by limiting current
To store energy for the LED
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a potentiometer used for?
To adjust voltage in a circuit
To store electrical energy
To measure temperature
To convert AC to DC
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which type of resistor is adjusted by mechanical movement?
Fixed resistor
Digital potentiometer
Variable resistor
Wire wound resistor
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