Embibe Experts Solutions for Chapter: Current Electricity, Exercise 1: Jharkhand Board-2018

Two copper wires of length $l$ and $2 l$ have radii $r$ and $2 r$ respectively. The ratio of their specific resistances is.

A uniform wire of resistance $R$ is cut into $n$ equal parts. These parts are then connected in parallel with each, other. The equivalent resistance of combination is,

Define internal resistance of a cell. State two factors on which it depends.

Explain with circuit diagram the parallel combination of identical cells. Obtain the condition for maximum current in the external resistance connected with the combination.

If a uniform wire of resistance $16 \mathrm{\Omega }$ is cut into four equal parts and attached in parallel combination, the equivalent resistance is

Kirchhoff's point rule is a direct consequence of law of conservation of

What are the factors on which the resistance of a conductor depends? Give the corresponding relation.

State the principle of potentiometer. Compare the electromotive force of two cell using potentiometer.