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Electric circuits Quiz for Grade 8

10 science questions on electric circuits with answers, written for Grade 8. Use it as it is, change any question, print it with an answer key, or give it online and let it grade itself.

1.
What is the unit of electric current? (Multiple choice)
  1. Ohm
  2. Ampere
  3. Watt
  4. Volt
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Ampere

Electric current is measured in amperes, which indicate the flow of electric charge.
2.
Which component is used to resist the flow of current in a circuit? (Multiple choice)
  1. Resistor
  2. Capacitor
  3. Battery
  4. Switch
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Resistor

A resistor reduces the current flow by providing resistance in the circuit.
3.
In a series circuit, what happens to the current as it flows through each resistor? (Multiple choice)
  1. It decreases
  2. It increases
  3. It stops
  4. It stays the same
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It stays the same

In a series circuit, the current is the same through all components.
4.
What device is used to open or close an electric circuit? (Multiple choice)
  1. Resistor
  2. Switch
  3. Light bulb
  4. Battery
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Switch

A switch controls the flow of current by opening or closing the circuit.
5.
Which of the following materials is a good conductor of electricity? (Multiple choice)
  1. Plastic
  2. Copper
  3. Rubber
  4. Glass
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Copper

Copper allows electric current to flow easily, making it a good conductor.
6.
A parallel circuit has multiple paths for the current to flow. (True or false)
  1. True
  2. False
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True

Parallel circuits provide more than one path for current to flow.
7.
The voltage across each resistor in a series circuit is the same. (True or false)
  1. True
  2. False
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False

In series circuits, voltage divides among resistors, so it is not the same across each.
8.
Name the component that stores electrical energy in an electric circuit. (Identification)
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Capacitor

A capacitor stores electrical energy temporarily in a circuit.
9.
The _____ is the source of electrical energy in a circuit. (Fill in the blank)
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battery

A battery provides the electrical energy needed to power a circuit.
10.
Match each component with its function. (Matching type)
1. Resistor
A. Limits current flow
2. Switch
B. Opens or closes the circuit
3. Battery
C. Provides electrical energy
4. Light bulb
D. Converts electrical energy to light
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1 = Limits current flow; 2 = Opens or closes the circuit; 3 = Provides electrical energy; 4 = Converts electrical energy to light

Each component has a specific role in an electric circuit.