Start learning →

Kerala SSLC (Class 10) Physics — practice by topic

Browse 106 questions across 6 Physics topics. Choose what you want to revise, then open a question to check its answer and worked solution.

Start learning Kerala SSLC (Class 10) with Quill →

Physics topics

Calorimetry (35)Ray Optics and Optical Instruments (34)Electricity: Current and Household Circuits (20)Light and Sound (12)Light and Optics (4)Sound (1)

Try a Physics question

A convex lens is also called a:Read the answer and worked solution →The focal length of a concave lens is taken to be:Read the answer and worked solution →Power of a lens has the SI unit:Read the answer and worked solution →An object placed at 2F from a convex lens forms an image:Read the answer and worked solution →

Worked practice questions

A convex lens is also called a:

  1. Converging lens
  2. Diverging lens
  3. Flat lens
  4. Mirror lens
Show answer and solution

Correct answer: A. Converging lens

1. A convex lens is thicker in the middle. 2. Parallel rays after passing through it converge to a real focus. 3. Hence it is called a converging lens. 4. A concave lens diverges rays. _Source: Selina Concise Physics ICSE Class 10, Ch 5 'Refraction through a Lens' (aplustopper.com extract)_

Open this question →

The focal length of a concave lens is taken to be:

  1. Positive
  2. Negative
  3. Zero
  4. Imaginary
Show answer and solution

Correct answer: B. Negative

1. Concave lens has a virtual focus on the same side as the object. 2. By sign convention, focal length on the incoming-light side is negative. 3. So a concave lens has negative focal length. 4. A convex lens has positive focal length. _Source: Selina Concise Physics ICSE Class 10, Ch 5 'Refraction through a Lens' (aplustopper.com extract)_

Open this question →

Power of a lens has the SI unit:

  1. Newton
  2. Watt
  3. Dioptre
  4. Lumen
Show answer and solution

Correct answer: C. Dioptre

1. Power P = 1 / f where f is in metres. 2. So power has the unit of inverse metre. 3. This unit is called the dioptre (D). 4. So the SI unit of power of a lens is the dioptre. _Source: Selina Concise Physics ICSE Class 10, Ch 5 'Refraction through a Lens' (aplustopper.com extract)_

Open this question →

How to practise

  1. Choose a Physics question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.