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Test: Energy Dissipation - Year 7 MCQ


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10 Questions MCQ Test - Test: Energy Dissipation

Test: Energy Dissipation for Year 7 2024 is part of Year 7 preparation. The Test: Energy Dissipation questions and answers have been prepared according to the Year 7 exam syllabus.The Test: Energy Dissipation MCQs are made for Year 7 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Energy Dissipation below.
Solutions of Test: Energy Dissipation questions in English are available as part of our course for Year 7 & Test: Energy Dissipation solutions in Hindi for Year 7 course. Download more important topics, notes, lectures and mock test series for Year 7 Exam by signing up for free. Attempt Test: Energy Dissipation | 10 questions in 20 minutes | Mock test for Year 7 preparation | Free important questions MCQ to study for Year 7 Exam | Download free PDF with solutions
Test: Energy Dissipation - Question 1
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Which is the MAIN energy transfer taking place when a gas fire burns?

Detailed Solution for Test: Energy Dissipation - Question 1
The energy stored in gas is chemical, light is also produced but is not the main product
Test: Energy Dissipation - Question 2
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Which is the MAIN energy transfer when you drop a ball?

Detailed Solution for Test: Energy Dissipation - Question 2
The ball has potential (stored) energy due to gravity
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Test: Energy Dissipation - Question 3
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Which is the MAIN energy transfer when a cyclist brakes to stop?

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The thermal (heat) energy is produced by friction
Test: Energy Dissipation - Question 4
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Which is the MAIN energy transfer when using a microphone?
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A microphone converts sound into an electrical signal. This can then be saved to a computer file or amplified and sent through a loudspeaker system so that it can be heard further away
Test: Energy Dissipation - Question 5
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Which is the MAIN energy transfer in a solar cell on a calculator?
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Solar cells can be used on a much larger scale to generate electricity
Test: Energy Dissipation - Question 6
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What is the primary energy transformation that occurs when a bus uses fuel to move?
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The main energy change for the bus is the conversion of chemical energy (from the fuel) into kinetic energy (to move the bus). Although there are intermediate steps, the desired form of energy for the purpose of moving the bus is kinetic energy.

Test: Energy Dissipation - Question 7
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Which is the MAIN energy transfer in a loudspeaker?
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The electrical signals vibrate a cone in the loudspeaker to produce sound waves
Test: Energy Dissipation - Question 8
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Why is no energy change 100% efficient in the case of a bus engine?
Detailed Solution for Test: Energy Dissipation - Question 8

In the process of converting chemical energy to kinetic energy, some energy is inevitably lost as heat due to the inefficiencies in the system, such as friction between moving parts and heat lost through the exhaust pipe.

Test: Energy Dissipation - Question 9
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Which is the MAIN energy transfer when a wind-up clockwork toy is released?
Detailed Solution for Test: Energy Dissipation - Question 9
The spring unwinds because of the stored elastic potential energy it contains. As the spring does this, its movement can be used to make the toy do things
Test: Energy Dissipation - Question 10
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What happens to the heat energy that is considered wasted in the bus engine?
Detailed Solution for Test: Energy Dissipation - Question 10

The wasted heat energy from the bus engine dissipates into the environment and becomes unusable for further energy conversions, thus being lost as a useful form of energy.

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