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Test: What are conductors and insulators? - Year 4 MCQ


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10 Questions MCQ Test Year 4 Science - Test: What are conductors and insulators?

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Test: What are conductors and insulators? - Question 1

Which of these could be used to complete an electrical circuit?

Detailed Solution for Test: What are conductors and insulators? - Question 1
Scissors are made of metal and all metals can conduct electricity
Test: What are conductors and insulators? - Question 2

Why are electrical plugs made of plastic?

Detailed Solution for Test: What are conductors and insulators? - Question 2
Plastic is an electrical insulator. If plugs weren't made of plastic (or another insulator), it would be impossible to touch the plug without receiving an extremely dangerous electric shock
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Test: What are conductors and insulators? - Question 3

Why are insulators important in an electrical circuit?

Detailed Solution for Test: What are conductors and insulators? - Question 3
Insulating materials protect us (and other living organisms) from electrical currents and they also protect the circuit from damage or interference
Test: What are conductors and insulators? - Question 4
In a complete electrical circuit, which materials does electricity flow through?
Detailed Solution for Test: What are conductors and insulators? - Question 4
Every component (part) of a complete electrical circuit must include a material which conducts electricity
Test: What are conductors and insulators? - Question 5
Which of these is a good electrical conductor?
Detailed Solution for Test: What are conductors and insulators? - Question 5
Electricity passes easily though anything wet, such as sweaty hands, and also through the human body. This is why it is so important to NEVER touch a live lead and to always be careful when using electrical objects. Never touch anything electric when you have damp hands
Test: What are conductors and insulators? - Question 6
A material which is an electrical conductor does what?
Detailed Solution for Test: What are conductors and insulators? - Question 6
Conductors are used to transfer electricity from one place to another, for example in a circuit
Test: What are conductors and insulators? - Question 7
Which of these is not an electrical insulator?
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Silver, like other metals, is not a good electrical insulator. In fact, silver is the best electrical conductor. Because of its expense, it is not used as often as copper
Test: What are conductors and insulators? - Question 8

Which of the following materials is commonly used as a conductor in electrical wires?

Detailed Solution for Test: What are conductors and insulators? - Question 8

Copper is widely used in electrical wiring due to its excellent conductivity. It allows electricity to flow easily through wires, making it ideal for conducting electrical currents in circuits.

Test: What are conductors and insulators? - Question 9

Why are overhead power lines often supported by insulators such as ceramic or glass?

Detailed Solution for Test: What are conductors and insulators? - Question 9

Insulators prevent electricity from flowing from the power lines to the poles or towers they are mounted on, reducing the risk of electric shock to anyone or anything that touches them.

Test: What are conductors and insulators? - Question 10

Which of these metals is commonly used as a conductor in electronics due to its lower cost compared to silver?

Detailed Solution for Test: What are conductors and insulators? - Question 10

Aluminum is often used as a conductor in electronics and power transmission due to its good conductivity and lower cost compared to silver and gold.

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