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Test: Electricity - Year 9 MCQ


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10 Questions MCQ Test Year 9 Physics (Cambridge) - Test: Electricity

Test: Electricity for Year 9 2024 is part of Year 9 Physics (Cambridge) preparation. The Test: Electricity questions and answers have been prepared according to the Year 9 exam syllabus.The Test: Electricity MCQs are made for Year 9 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Electricity below.
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Test: Electricity - Question 1

Two bulbs are in series in a complete circuit. If the voltage is increased:

Detailed Solution for Test: Electricity - Question 1
The number of bulbs was not changed so there is more current flowing and the bulbs are brighter
Test: Electricity - Question 2

Wires are normally made from copper. This is because:

Detailed Solution for Test: Electricity - Question 2
It is also very malleable and can therefore easily be bent to go round corners
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Test: Electricity - Question 3

The current in a series circuit containing two bulbs:

Detailed Solution for Test: Electricity - Question 3
This is an important point to remember about a series circuit
Test: Electricity - Question 4
Wires are usually coated in plastic because:
Detailed Solution for Test: Electricity - Question 4
Wires used to be covered with rubber as an insulator but rubber perishes faster than plastic
Test: Electricity - Question 5
Three identical bulbs are in parallel in a complete circuit. The current in each bulb:
Detailed Solution for Test: Electricity - Question 5
The current in each bulb is a third of the total current flowing round the circuit
Test: Electricity - Question 6

Which of the following statements is true?

Test: Electricity - Question 7
Two identical bulbs are in parallel in a complete circuit. A third identical bulb is connected in parallel. What happens?
Detailed Solution for Test: Electricity - Question 7
Adding identical bulbs in parallel uses more current but brightness stays the same
Test: Electricity - Question 8

What happens to the total resistance in a circuit when resistors are added in parallel?

Detailed Solution for Test: Electricity - Question 8

When resistors are added in parallel, the total resistance decreases because the combined path for current flow increases.

Test: Electricity - Question 9

What is the SI unit of electric current?

Detailed Solution for Test: Electricity - Question 9

The ampere (A) is the SI unit of electric current, measuring the rate of flow of electric charge.

Test: Electricity - Question 10

Which of the following materials is the best conductor of electricity?

Detailed Solution for Test: Electricity - Question 10

Copper is the best conductor of electricity among the options listed. It has high electrical conductivity due to its free electrons that are able to move easily through the material.

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