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Important Questions

Work, Energy and Power — Important Questions

Telangana Open School (TOSS) · Class 12 · Physics

47 important questions from Work, Energy and Power for Telangana Open School (TOSS) Class 12 Physics, with answers. Written for the board exams 2027.

47 questions25 flashcards15 formulas & key relations5 concepts

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47 Questions·
multiple choicemultiple correcttrue false

Important Questions from Work, Energy and Power

1multiple choice
1 marks

Work done by a force is positive when:

Show answer

θ = 0°

When θ = 0°, cosθ = 1, so W = FS > 0, positive work.

2multiple choice
1 marks

The work done by gravity when a body is lifted upwards is:

Show answer

Negative

When lifting, displacement is upward, gravity downward, so θ = 180°, cos180° = -1, so W = -mgh.

3multiple choice
1 marks

Kinetic energy of a body depends on:

Show answer

Mass and velocity

Kinetic energy K = ½mv², so it depends on mass and velocity.

4multiple choice
1 marks

What is the unit of power?

Show answer

Watt

The SI unit of power is watt (W), which is joule per second.

+43 more questions on Work, Energy and Power (Telangana Open School (TOSS) Class 12 Physics)

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Frequently Asked Questions

What are the important topics in Work, Energy and Power for Telangana Open School (TOSS) Class 12 Physics?
Key topics in Work, Energy and Power include Work and Its Calculation, Work Done by Variable Force and Springs, Kinetic Energy and Work-Energy Theorem, Potential Energy and Conservation of Energy. Study these first, then practise questions on each for the Telangana Open School (TOSS) Class 12 board exam.
How many important questions are there in Work, Energy and Power?
Super Tutor has 47 practice questions for Work, Energy and Power, including multiple choice, multiple correct, true false questions. A sample with answers is on this page.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All Telangana Open School (TOSS) Class 12 Physics Important Questions

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