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Current Electricity

CBSE Class 12 · Physics · 23 past questions

  1. Q1 2026
    Questions number 13 to 16 are Assertion (A) and Reason (R) type questions. Two statements are given — one…
  2. Q2 2026
    Questions number 13 to 16 are Assertion (A) and Reason (R) type questions. Two statements are given — one…
  3. Q3 2026
    Two heaters rated as $(P_1, V)$ and $(P_2, V)$ are connected in series across a dc source of $\frac{V}{2}$…
  4. Q4 2026
    Assertion (A) : Two electric heaters of power $P_1$ and $P_2(>P_1)$ are joined in series across a dc source…
  5. Q5 2026
    A heating element using nichrome is connected to a 220 V supply. Initially it draws a current of 2.9 A. After…
  6. Q6 2025
    A student has three resistors, each of resistance R. To obtain a resistance of $\frac{2}{3}$R, she should…
  7. Q7 2025
    Assertion (A) : The deflection in a galvanometer is directly proportional to the current passing through it.…
  8. Q8 2025
    Two batteries of emf's 3V & 6V and internal resistances 0.2 $\Omega$ & 0.4 $\Omega$ are connected in…
  9. Q9 2024
    Determine the current in branches AB, AC and BC of the network shown in figure. (with a figure)
  10. Q10 2024
    Consider the circuit shown in the figure. The potential difference between points A and B is… (with a figure)
  11. Q11 2024
    Find the temperature at which the resistance of a wire made of silver will be twice its resistance at…
  12. Q12 2024
    Electrons drift with speed $v_d$ in a conductor with potential difference V across its ends. If V is reduced…
  13. Q13 2024
    The figure shows a circuit with three ideal batteries. Find the magnitude and direction of currents in the… (with a figure)
  14. Q14 2024
    When the terminals of a cell are connected to a conductor of resistance R, an electric current flows through…
  15. Q15 2023
    A current of 0.8 A flows in a conductor of 40 Ω for 1 minute. The heat produced in the conductor will be
  16. Q16 2023
    A cell of emf E is connected across an external resistance R. When current 'I' is drawn from the cell, the…
  17. Q17 2023
    The current density due to drift of electrons in a conductor is given by : (symbols have their usual meanings)
  18. Q18 2023
    Questions number 16 to 18 are Assertion (A) and Reason (R) type questions. Two statements are given — one…
  19. Q19 2023
    A potential difference V is applied across a conductor of length $l$ and uniform cross-section area A. How…
  20. Q20 2023
    For a metallic conductor, the correct representation of variation of resistance R with temperature T is… (with a figure)
  21. Q21 2023
    The potential difference across a cell in an open circuit is 8 V. It falls to 4 V when a current of 4 A is…
  22. Q22 2023
    A steady current flows through a metallic wire whose area of cross-section (A) increases continuously from… (with a figure)
  23. Q23 2023
    The following figure shows a circuit diagram. We can find the currents through and potential differences… (with a figure)