PYQ Vault

Day 80: CBSE Class 10 Science

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

  1. Question 1

    Magnetic Effects of Electric Current. Asked once: 2025 (same type asked 4 times)

    36 (a)
    (a) Study the following electric circuit diagram and answer the questions that follow : (i) What does the circuit diagram shows ? (ii) What will happen if the direction of current is reversed ? Justify your answer giving circuit diagram. (b) Name and state the rule to determine the direction of magnetic field associated with a straight current carrying conductor.

  2. Question 2

    Magnetic Effects of Electric Current. Asked once: 2026 (same type asked 4 times)

    39 (a)
    (i) The magnetic field lines due to two bar magnets X and Y are shown in the given diagram. If the magnet X is displaced towards magnet Y, will there be repulsion or attraction between them ? Justify. (ii) A metallic conductor is suspended perpendicular to the magnetic field of a horseshoe magnet. The conductor gets displaced towards the left when a current is passed through it. What will be the effect on displacement of conductor if the : (I) Current through the conductor is increased ? (II) Horseshoe magnet is replaced by another stronger horseshoe magnet ? (III) Direction of current through the conductor is reversed ?

  3. Question 3

    Metals and Non-metals. Asked once: 2025 (same type asked 4 times)

    2
    The products formed when Aluminium and Magnesium are burnt in the presence of air respectively are :

    Tap an option to check your answer.

  4. Question 4

    Metals and Non-metals. Asked once: 2026 (same type asked 4 times)

    26 (b)
    Give reasons : (i) Metal sulphides and carbonates should be converted to their metal oxides in the process of extraction of metals. (ii) Aluminium oxide is considered as an amphoteric oxide. (iii) Metals like Na, K, Ca and Mg are never found in their free state in nature.

  5. Question 5

    Metals and Non-metals. Asked once: 2025 (same type asked 4 times)

    28 (a)
    With the help of an activity, explain the conditions under which iron articles get rusted.