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Year 4 Exam  >  Year 4 Tests  >  Test: How can you change a circuit? - Year 4 MCQ

Test: How can you change a circuit? - Year 4 MCQ


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10 Questions MCQ Test - Test: How can you change a circuit?

Test: How can you change a circuit? for Year 4 2024 is part of Year 4 preparation. The Test: How can you change a circuit? questions and answers have been prepared according to the Year 4 exam syllabus.The Test: How can you change a circuit? MCQs are made for Year 4 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: How can you change a circuit? below.
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Test: How can you change a circuit? - Question 1
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What symbol is used in a circuit diagram to represent a bulb?

Detailed Solution for Test: How can you change a circuit? - Question 1
The letter M inside a circle represents a motor
Test: How can you change a circuit? - Question 2
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What will a circuit with an open switch do?

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If the switch is open then there is a break in the circuit. By closing the switch the circuit is made complete
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Test: How can you change a circuit? - Question 3
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You have made a simple circuit with one bulb. If you wanted to add an extra bulb without the first bulb dimming, what would you need to design?

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Unlike a series circuit, the lamps stay bright if you add more in a parallel circuit
Test: How can you change a circuit? - Question 4
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What is an electrical circuit?
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Electrical current flows in one direction from the negative pole of a battery around a complete circuit to the positive pole of the battery
Test: How can you change a circuit? - Question 5
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With which group of items could you not build a complete circuit?
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Cells, or batteries, are the source of energy in a circuit
Test: How can you change a circuit? - Question 6
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Which of these materials would not be a good electrical conductor?
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Most metals are excellent electrical conductors. Some metals, such as aluminium, do not conduct electricity as well as other metals
Test: How can you change a circuit? - Question 7
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Why might a circuit fail to work?
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Dead batteries, incorrectly wired leads and breaks in the circuit are just some of the reasons why a circuit might not work
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In a parallel circuit, what happens if one bulb stops working?
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In a parallel circuit, each bulb (or load) is connected directly to the power source. This means that if one bulb stops working, it does not affect the other bulbs because they each have their own separate path to the power source. Thus, only the non-working bulb will be affected, and the others will continue to stay lit.

Test: How can you change a circuit? - Question 9
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What happens to the brightness of bulbs in a series circuit if more bulbs are added?
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In a series circuit, adding more bulbs increases the overall resistance in the circuit. This causes the current to decrease, resulting in all bulbs becoming dimmer.

Test: How can you change a circuit? - Question 10
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What is the purpose of using a fuse in an electrical circuit?
Detailed Solution for Test: How can you change a circuit? - Question 10

A fuse is a safety device that interrupts the flow of electricity in a circuit if current exceeds a safe level. It protects the circuit and its components from damage due to excessive current, such as during a short circuit or overload.

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