What is potential difference of a cell?

Cell Potential is the measure of the potential difference between two half cells in an electrochemical cell.

The potential difference in a cell is caused by the ability of electrons to flow from one-half of the cell to the other.
Electrochemical cell anatomy is given below –

Electrochemical Cell

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Cells, EMF, and Internal Resistance – Important Topics
Unit of Specific Resistance	Resistivity Temperature Dependence	Internal resistance formula	Uses of Resistor
Meter bridge	Cells in Series and in Parallel	Current	Current Density
Types of Circuits	Power Of Alternating Current	Resistor Colour Codes	Unit of Current
Voltage	Difference between kva and kw	Electrical Formula	Conductivity
Ohm’s law	Relation between kva and kw	Combination of Resistors	Resistance
Wheatstone Bridge	Difference between AC and DC	Potentiometer	Difference between emf and voltage
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Types of Current	Differences Between Acceleration and Velocity	Power transformers	Drift Velocity
Carbon Resistor	Relation between resistance and length	Static Electricity	Current Electricity
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CBSE CLASS XII Related Questions

1.
Two air-filled capacitors of capacitances $C_1$ and $C_2$ are connected in parallel with a dc battery. After the capacitors are fully charged, a slab of dielectric constant K is inserted between the plates of each capacitor. How will the (i) charge on each capacitor and (ii) energy stored in the capacitor affected after the slab is introduced.
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2.
An electric field $\vec{E}$ is established across the ends of a cylindrical conductor of length L and area of cross-section A. Discuss how electrons attain an average velocity, independent of time. Hence, obtain a relation between current in the conductor and this ‘average velocity’ of electrons.
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3.
A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.
4.
A charged particle $+q$ in an electric field $\vec{E}$ experiences a force in the direction of the electric field. As a result, its kinetic energy changes. Similarly, the charged particle also experiences a force when it moves in a magnetic field $\vec{B}$. But this magnetic force is perpendicular to both velocity $\vec{v}$ of the charged particle and the magnetic field $\vec{B}$, so it cannot change the kinetic energy of the charged particle. Consider two charged particles 1 and 2 of masses $m$ and $\frac{m}{2}$ having charges $-q$ and $+2q$ respectively. They are accelerated from rest through the same potential difference $V$ and acquire kinetic energy $K_1$ and $K_2$. Then they enter in a region of uniform magnetic field $\vec{B}$ perpendicular to their velocities.
5.
With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.
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6.
Read the following paragraph and answer the questions that follow.
A p-type or n-type semiconductor can be converted into a p-n junction by doping it with suitable impurity. The motion of majority charge carriers causes diffusion current across the junction while the barrier electric field causes motion of minority carriers for drift current. In case of unbiased diode, the diffusion and drift currents are equal. This equilibrium is disturbed by the biasing batteries. Diodes, therefore, allow currents in one direction. This property of diode is used in making rectifiers.

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