Embibe Experts Solutions for Chapter: Current Electricity, Exercise 1: Exercise#1

If on applying the potential of $20 \mathrm{V}$ on a conductor its conductance becomes $8\left(\mathrm{\Omega }\right){}^{-1},$ then the current flowing through it will be

Two wires of same dimension but resistivities ${\rho }_1$ and ${\rho }_2$ are connected in series. The equivalent resistivity of the combination is:

The dimensions of a block are $1 \mathrm{cm}\times 1 \mathrm{cm}\times 100 \mathrm{cm}$. If the specific resistance of its material is $2\times {10}^{-7}$ $\mathrm{ohm}$$\times$$\mathrm{metre}$, then the resistance between the opposite rectangular faces is

When a resistance wire is passed through a die the cross-section area decreases by $1\%,$ the change in resistance of the wire is

Nine resistors each of resistance $R$ are connected in the circuit as shown in the figure. The net resistance between $A$ and $B$ is,

A wire has a resistance of $12 \mathrm{\Omega }$. If it is bent in the form of an equilateral triangle, the resistance between any two terminals in $\mathrm{\Omega }$ is,

For the network of resistance shown in the figure the equivalent resistance of the network between the points $A$ and $B$ is $18$ ohm. The value of unknown resistance $R$ is:-

When a wire of uniform cross-section $a$, length $l$ and resistance $R$ is bent into a complete circle, the resistance between two diametrically opposite points will be