PYQ Vault

Day 9: CBSE Class 10 Science

5 questions. Try each one first, then open its answer.

  1. Question 1

    Light — Reflection and Refraction. Asked 3 times: 2023*, 2024*, 2026 (* = numbers or wording changed that year)

    30
    A convex lens of focal length 15 cm, is forming a real image. If the size of image is same as the size of object, then position of object and position of image will be, respectively :

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  2. Question 2

    Magnetic Effects of Electric Current. Asked 3 times: 2023*, 2024*, 2026 (* = numbers or wording changed that year)

    39 (a)
    (i) State the rules to determine the following : (I) Direction of magnetic field produced around a current-carrying straight conductor. (II) Direction of force experienced by a current-carrying straight conductor placed in a magnetic field which is perpendicular to it. (ii) (I) Draw the magnetic field lines due to a current-carrying solenoid. (II) Three points A, B and C are marked in the above given diagram of the current-carrying solenoid. Out of the three points A, B and C, at which point is the magnetic field strength maximum and at which point is it minimum ?

  3. Question 3

    Magnetic Effects of Electric Current. Asked 3 times: 2023*, 2025*, 2026 (* = numbers or wording changed that year)

    39 (b)
    (i) Draw the pattern of magnetic field lines through and around a current-carrying circular loop. (ii) State the rule to find out the direction of the magnetic field inside and around the circular loop. (iii) Give reasons : (I) Why should a burnt-out fuse be replaced by another fuse of identical rating only, in an electric circuit ? (II) Why is soft iron-core used in making an electromagnet ?

  4. Question 4

    Magnetic Effects of Electric Current. Asked 3 times: 2024*, 2025*, 2026 (* = numbers or wording changed that year)

    39 (b)
    (i) Draw a schematic diagram of a domestic electric circuit which includes the following devices : (I) A fuse (II) A power meter (III) One light point (IV) A power plug (ii) Why is it necessary to connect an earth wire to the electrical appliances having metallic covers ?

  5. Question 5

    Metals and Non-metals. Asked 3 times: 2023*, 2024*, 2026 (* = numbers or wording changed that year)

    19
    Which of the following is an amphoteric oxide ?

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