Current Electricity

CBSE Class 12 · Physics · 23 past questions

10 of 23 · show all

Q6 2025

A student has three resistors, each of resistance R. To obtain a resistance of $\frac{2}{3}$R, she should…
Q7 2025

Assertion (A) : The deflection in a galvanometer is directly proportional to the current passing through it.…
Q11 2024

Find the temperature at which the resistance of a wire made of silver will be twice its resistance at…
Q12 2024

Electrons drift with speed $v_d$ in a conductor with potential difference V across its ends. If V is reduced…
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
Q16 2023

A cell of emf E is connected across an external resistance R. When current 'I' is drawn from the cell, the…
Q17 2023

The current density due to drift of electrons in a conductor is given by : (symbols have their usual meanings)
Q18 2023

Questions number 16 to 18 are Assertion (A) and Reason (R) type questions. Two statements are given — one…
Q20 2023

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