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Class 6 Exam  >  Class 6 Tests  >  Test: Energy -2 - Class 6 MCQ

Test: Energy -2 - Class 6 MCQ


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10 Questions MCQ Test - Test: Energy -2

Test: Energy -2 for Class 6 2024 is part of Class 6 preparation. The Test: Energy -2 questions and answers have been prepared according to the Class 6 exam syllabus.The Test: Energy -2 MCQs are made for Class 6 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Energy -2 below.
Solutions of Test: Energy -2 questions in English are available as part of our course for Class 6 & Test: Energy -2 solutions in Hindi for Class 6 course. Download more important topics, notes, lectures and mock test series for Class 6 Exam by signing up for free. Attempt Test: Energy -2 | 10 questions in 15 minutes | Mock test for Class 6 preparation | Free important questions MCQ to study for Class 6 Exam | Download free PDF with solutions
Test: Energy -2 - Question 1
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Which of the following statements best describes energy dissipation during energy transfers?

Detailed Solution for Test: Energy -2 - Question 1

Answer: d) Energy dissipation means that some energy is always wasted during transfers, often as heat, sound, or light that cannot be used efficiently.

Test: Energy -2 - Question 2
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What type of energy is stored when elastic objects such as springs or rubber balls are stretched or squashed?

Detailed Solution for Test: Energy -2 - Question 2
When elastic objects like springs or rubber balls are stretched or compressed, they store potential energy known as elastic potential energy. This energy is a form of potential energy that is stored in an elastic object when it is stretched or compressed.
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Test: Energy -2 - Question 3
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How is kinetic energy defined in relation to moving objects?

Detailed Solution for Test: Energy -2 - Question 3
Kinetic energy is the energy stored in an object due to its motion. The kinetic energy of an object is directly proportional to its mass and the square of its velocity. When an object moves, it stores energy in the form of kinetic energy.
Test: Energy -2 - Question 4
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How is energy typically transferred through the process of heating?
Detailed Solution for Test: Energy -2 - Question 4
Energy transfer through heating involves raising the temperature of an object by utilizing the heat emitted from a hot source. This process is commonly observed in everyday scenarios like boiling water on a stove or warming a room with a heater. Understanding how energy is transferred through heating is fundamental to grasping the concept of thermal energy and its practical applications in various systems.
Test: Energy -2 - Question 5
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In the context of energy transfers, which of the following best describes the concept of work?
Detailed Solution for Test: Energy -2 - Question 5
In the realm of energy transfers, work is defined as the exertion of force that results in the transfer of energy, leading to movement. This concept is akin to the work done by engines in vehicles, where energy from fuel is utilized to propel the vehicle forward. Understanding the concept of work is crucial in comprehending how energy is transferred through the application of force in various mechanical systems.
Test: Energy -2 - Question 6
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How do devices powered by electricity, such as motors and heaters, typically transfer energy?
Detailed Solution for Test: Energy -2 - Question 6
Devices powered by electricity, such as motors and heaters, transfer energy by either generating heat or performing mechanical work. For instance, an electric motor converts electrical energy into mechanical energy to drive machinery, while an electric heater transforms electrical energy into heat energy to warm up a space. Understanding how electric devices transfer energy is crucial in modern technology and everyday applications where electricity is a primary energy source.
Test: Energy -2 - Question 7
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In the concept of situational efficiency, what represents wasted energy in the context of heating a house on a cold day?
Detailed Solution for Test: Energy -2 - Question 7
In the context of heating a house on a cold day, the heat lost through walls, windows, doors, and the roof represents wasted energy. This lost heat contributes to inefficiency in maintaining the desired temperature inside the house, requiring more energy to compensate for the heat loss.
Test: Energy -2 - Question 8
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What is one common cause of energy dissipation ?
Detailed Solution for Test: Energy -2 - Question 8

One common cause of energy dissipation is friction. When objects or surfaces rub against each other, they generate heat and result in the dissipation of energy. This process leads to the spreading out of energy and makes it less available for useful work.

Test: Energy -2 - Question 9
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How does dissipated energy impact its usability ?
Detailed Solution for Test: Energy -2 - Question 9

Dissipated energy, such as thermal energy from friction or heat from electronic devices, becomes too spread out to be utilized effectively, rendering it wasted. This spreading out of energy decreases its availability for useful work or conversion into other forms of energy.

Test: Energy -2 - Question 10
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Which of the following statements correctly describes thermal energy?

 

 

 

 

 

 

 

 

 
Detailed Solution for Test: Energy -2 - Question 10

Answer:  It is the energy stored in objects due to the motion of tiny particles within them.

Explanation: Thermal energy is indeed the energy stored in objects due to the motion of their particles, which increases with temperature as the particles move or vibrate more vigorously.

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Important Questions for Energy -2

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Energy -2 MCQs with Answers

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