Current Electricity

Bihar Board Class 12 · Physics · 60 past questions

46 of 60 · show all

1. Q2 2026 Set A

   In a metallic conductor, the current is carried by

   Try it →
2. Q3 2026 Set A

   Which factor of the following does not affect resistance of a conducting wire ?

   Try it →
3. Q4 2026 Set A

   An ideal ammeter has

   Try it →
4. Q5 2026 Set A

   Ohm's law does not apply, when

   Try it →
5. Q6 2026 Set A

   Which of the following expressions represents electrical energy ?

   Try it →
6. Q7 2026 Set A

   The relationship between current density $\vec{J}$, specific conductance $\sigma$ and electric field…

   Try it →
7. Q8 2026 Set A

   The yellow colour code value of carbon resistance is

   Try it →
8. Q9 2026 Set A

   The equivalent resistance of resistors in parallel combination

   Try it →
9. Q10 2025 Set D

   Kilowatt-hour (kWh) is the unit of

   Try it →
10. Q11 2025 Set D

    The relation between drift velocity $v$ of free electrons in conductor in electric conduction and potential…

    Try it →
11. Q13 2025 Set D

    With the rise in temperature, the resistance of semiconductor

    Try it →
12. Q14 2025 Set D

    Which of the following represents resistance, $R$? ($\rho$ = resistivity, $l$ = length of a material, $A$ =…

    Try it →
13. Q15 2025 Set D

    In a series circuit with resistors $R_1$, $R_2$, and $R_3$, the current flowing through each resistor is

    Try it →
14. Q16 2025 Set D

    The unit of current density is

    Try it →
15. Q18 2025 Set D2021 Set A

    Power of electric circuit is

    Try it →
16. Q22 2024 Set A

    To increase the sensitivity of a potentiometer

    Try it →
17. Q23 2024 Set A

    Kirchhoff's second law of electricity is related to

    Try it →
18. Q24 2024 Set A

    Current used in electroplating is

    Try it →
19. Q25 2023 Set F

    The motion of electron inside the conductor is

    Try it →
20. Q26 2023 Set F

    The relation between the drift velocity ($V_d$) and applied electric field (E) of a conductor is

    Try it →
21. Q27 2023 Set F

    What is mainly measured by potentiometer?

    Try it →
22. Q28 2023 Set F

    Two resistors R and 2R are connected in series in an electric circuit. The thermal energy developed in R and…

    Try it →
23. Q30 2022 Set I

    Which of the following is correct for current density?

    Try it →
24. Q31 2022 Set I

    Which of the following is correct for mobility?

    Try it →
25. Q33 2022 Set I

    Colour code of carbon resistance for blue colour is

    Try it →
26. Q34 2022 Set I

    Ampere-hour is the unit of

    Try it →
27. Q35 2022 Set I

    Resistance of ideal ammeter is

    Try it →
28. Q36 2021 Set A

    One ampere is equal to

    Try it →
29. Q37 2021 Set A

    Unit of electromotive force is

    Try it →
30. Q38 2021 Set A

    The heat produced in a conductor of resistance $R$ due to flow of current $I$ for time $t$ is

    Try it →
31. Q39 2021 Set A

    Value of green colour code on carbon resistance is

    Try it →
32. Q40 2021 Set A

    Which of the following is the best conductor of electricity?

    Try it →
33. Q41 2021 Set A

    Voltameter measures

    Try it →
34. Q42 2021 Set A

    Which of the following is the same in parallel connection of resistances ?

    Try it →
35. Q43 2021 Set A

    The value of yellow colour in colour code of carbon resistance is

    Try it →
36. Q44 2021 Set A

    Which of the following is correct for resistivity of a material ?

    Try it →
37. Q45 2019

    Power of an electric – circuit is

    Try it →
38. Q47 2019

    The resistance of ideal ammeter is

    Try it →
39. Q48 2019

    At constant potential difference, the resistance of any electric circuit is halved, the value of heat…

    Try it →
40. Q49 2019

    The current flowing; in a wire is 1 A. if the charge of an electron is $1.6\times10^{-19}C$, then the number…

    Try it →
41. Q51 2018

    The specific resistance of a conductor increases with…

    Try it →
42. Q52 2018

    The Drift velocity ($v_d$) and applied electric field (E) of a conductor are related as…

    Try it →
43. Q53 2018

    Four 12Ω resistances are connected in parallel. Three such combinations are connected in series. What will be…

    Try it →
44. Q56 2017

    Absorbed electrical energy is-

    Try it →
45. Q57 2017

    Wheat stone's bridge is used in measuring –

    Try it →
46. Q58 2017

    Explain that Kirchhoff's second law is law of conservation of energy.

    Try it →