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ICSE Class 10 Physics — practice by topic

Browse 1,046 questions across 12 Physics topics. Choose what you want to revise, then open a question to check its answer and worked solution.

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Physics topics

Ray Optics and Optical Instruments (221)Force and Machines (167)Work, Energy and Power (127)Electricity: Current and Household Circuits (100)Heat: calorimetry, specific heat capacity and latent heat (66)Modern Physics: radioactivity, nuclear fission and fusion (61)Sound: echoes, natural vibrations, loudness pitch and quality (54)Calorimetry (50)Force, Pressure & Fluids (50)Light and Sound (50)Magnetism: electromagnetism and uses of the electromagnet (50)Sound (50)

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What is the SI unit of force?Read the answer and worked solution →Which kind of motion happens when a fan blade rotates about its axis?Read the answer and worked solution →Moment of a force about a point is defined as which product?Read the answer and worked solution →The SI unit of moment of force is:Read the answer and worked solution →

Worked practice questions

What is the SI unit of force?

  1. Newton
  2. Joule
  3. Watt
  4. Pascal
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Correct answer: A. Newton

1. Force is defined as a push or pull that changes the state of motion of a body. 2. From Newton's second law, F = m·a, so its unit is kg·m/s². 3. This combined unit is given the name Newton (N) in the SI system. _Source: Selina Concise Physics ICSE Class 10, Ch 1 'Force' (icsehelp.com chapter extract)_

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Which kind of motion happens when a fan blade rotates about its axis?

  1. Translational motion
  2. Rotational motion
  3. Vibrational motion
  4. Random motion
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Correct answer: B. Rotational motion

1. Translational motion means every point of the body moves in a straight line. 2. Rotational motion means different points trace circular paths around a fixed axis. 3. A fan blade spins about its central axis, so each point moves in a circle around that axis. 4. Hence the motion is rotational. _Source: Selina Concise Physics ICSE Class 10, Ch 1 'Force' (icsehelp.com chapter extract)_

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Moment of a force about a point is defined as which product?

  1. Force times time of application
  2. Mass times acceleration
  3. Force times perpendicular distance from the pivot
  4. Force divided by distance from the pivot
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Correct answer: C. Force times perpendicular distance from the pivot

1. The moment of a force is the turning effect produced about a pivot. 2. It depends on the magnitude of the force and the perpendicular distance from the pivot. 3. By definition, Moment = Force × Perpendicular distance from the pivot. _Source: Selina Concise Physics ICSE Class 10, Ch 1 'Force' (icsehelp.com chapter extract)_

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