Ohm's Law

A wire of  $15\mathrm{\Omega }$ resistance is gradually stretched to double its original length. It is then cut into two equal parts. These parts are then connected in parallel across a $3.0 \mathrm{V}$ battery. Find the current drawn from the battery.

A physical quantity, associated with electrical conductivity, has the SI unit ohm-meter. Identify this physical quantity.

Two cells X and Y are connected to a resistance of $10 \mathrm{\Omega }$ as shown in the figure. The terminal voltage of cell Y is

In the electrical network shown in the figure, the potential difference across $3 \mathrm{\Omega }$ resistance will be

Give one example of non-ohmic resistor.

Which one of the following is non-ohmic resistance 

Which of the following is non-ohmic resistance.

What is the unit of conductance?

In the uniform electric field of $E=1\times {10}^4 \mathrm{N} {\mathrm{C}}^{-1}$, an electron is accelerated from rest. The acceleration of the electron is nearly (Charge of electron $q=1.6\times {10}^{-19} \mathrm{C}$)

The acceleration of the electron while it is in the electric field is $-3.51\times {10}^{K }\hat{\mathrm{j}} \mathrm{m} {\mathrm{s}}^{-2}$. Find the value of K.

A cell of emf $E$ having an internal resistance $r$ is connected to an external resistance $R$. The potential difference $V$ across the resistance $R$ varies with $R$ as shown by the curve,

In the shown circuit, what is the potential difference across $A$ and $B$?

In the figure the potential difference across $6 \mathrm{ohm}$ resistor is $48 \mathrm{V}$. Then the potential difference between $A$ and $B$ is

Electric _____ between two points in an electric circuit carrying some current is defined as the work done to move a unit charge from one point to the other.

When temperature of a metal is increased, its conductivity

Two metal slabs of equal lengths, equal cross sectional areas and having resistances in the ratio $1:2$ are connected first in series and then in parallel separately. The ratio of their effective conductivities is

In the following diagram current in the $5\mathrm{\Omega }$ resistor is (when the internal resistance of the battery is zero) :-

Find the radius of the wire of length $25 \mathrm{m}$ needed to prepare a coil of resistance $25 \mathrm{\Omega }$ ( Resistivity of material of wire is $3.142\times {10}^{-7} \mathrm{\Omega } \mathrm{m}$) 

The product of resistivity and conductivity of a conductor depends on -