Electricity

CBSE Class 10 · Science · 23 past questions

10 of 23 · show all

Q1 2026

The resistance of a wire of 0.01 cm radius and 1.0 cm length is 7 $\Omega$. Calculate its resistivity.
Q3 2026

Consider the given electric circuit… (with a figure)
Q7 Sample paper 2026-27

The figure shows a circuit with a 15 V battery connected to several resistors. Using the given circuit… (with a figure)
Q10 2025

An electric kettle is rated 750 W; 220 V. Can this kettle be used in a circuit which has a fuse of current…
Q11 2025

A wire of length 'l' is gradually stretched so that its length increases to $3l$. If its original resistance…
Q14 2024

In case of four wires of same material, the resistance will be minimum if the diameter and length of the wire…
Q15 2024

Explain in brief the function of an electric fuse in a domestic circuit. An electric heater of current rating…
Q16 2024

Show how you would connect three resistors each of resistance 6 Ω, so that the combination has a resistance…
Q20 2023

The resistance of a resistor is reduced to half of its initial value. If other parameters of the electrical…
Q22 2023

V – I graph for two conducting wires A and B are as shown. If both wires are of the same length and same… (with a figure)