Current Electricity

CBSE Class 12 · Physics · 23 past questions

9 of 23 · show all

1. 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

   Try it →
2. Q16 2023

   A cell of emf E is connected across an external resistance R. When current 'I' is drawn from the cell, the…

   Try it →
3. Q17 2023

   The current density due to drift of electrons in a conductor is given by : (symbols have their usual meanings)

   Try it →
4. Q18 2023

   Questions number 16 to 18 are Assertion (A) and Reason (R) type questions. Two statements are given — one…

   Try it →
5. Q19 2023

   A potential difference V is applied across a conductor of length $l$ and uniform cross-section area A. How…

   Try it →
6. Q20 2023

   For a metallic conductor, the correct representation of variation of resistance R with temperature T is… (with a figure)

   Try it →
7. 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…

   Try it →
8. Q22 2023

   A steady current flows through a metallic wire whose area of cross-section (A) increases continuously from… (with a figure)

   Try it →
9. Q23 2023

   The following figure shows a circuit diagram. We can find the currents through and potential differences… (with a figure)

   Try it →