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Middle School: 6th, 7th and 8th Grade
Science
Electrical Circuits 3
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Q.1
Which of the following statements is true?
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A flow of electrons around a circuit is called an electric current
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A switch only turns the current off
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An open switch allows a small amount of current through it
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Two identical bulbs in a series circuit are brighter than one
Q.2
Wires are usually coated in plastic because .......
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plastic can be lots of different colors
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plastic helps the wires bend
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plastic helps the wires conduct electricity
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plastic is an insulator
Q.3
The current in a series circuit containing two bulbs .......
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is larger between the bulbs
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is larger nearer the battery
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is smaller nearer the battery
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is the same at every place in the circuit
Q.4
Two identical bulbs are in parallel in a complete circuit. If one breaks .......
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the other bulb is brighter
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the other bulb is dimmer
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the other goes off
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the other stays on
Q.5
Two identical bulbs are in parallel in a complete circuit. A third identical bulb is connected in parallel. What happens?
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All the bulbs are dimmer
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All the bulbs are the same brightness
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The third bulb is brighter
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The third bulb is dimmer
Q.6
Wires are normally made from copper. This is because .......
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copper has a high resistance
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copper is a very good conductor of electricity
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copper is cheap
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copper is expensive
Q.7
If the size of a battery in a complete circuit increases .......
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the current decreases
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the current increases
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the current stays the same
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the voltage stays the same
Q.8
Two bulbs are in series in a complete circuit. If the voltage increases .......
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the bulbs get brighter and the current decreases
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the bulbs get brighter and the current increases
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the bulbs get dimmer and the current decreases
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the bulbs get dimmer and the current increases
Q.9
Three identical bulbs are in parallel in a complete circuit. The current in each bulb .......
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is different in all bulbs
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is greatest in the bulb nearest the battery
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is the same
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is three times the current flowing from the battery
Q.10
Which of the following statements is true?
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A voltmeter is connected in series to measure voltage
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An ammeter is connected in parallel to measure current
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Different sized bulbs in parallel have a different sized current flowing through them
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In a series circuit the current through different bulbs adds up to current coming from the battery
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