State the Working Principle of a Potentiometer.

The working principle of a potentiometer is that the fall of potential energy across any portion of the wire is directly proportional to the length of that specific portion provided that the wire is of the uniform area of cross-section and the constant current flowing through it.

Related Questions

Read More:

Potentiometer – Important Concepts
Electromagnetic Field	Current Electricity Important Questions	Difference between AC and DC
Meter bridge	Relation between power and resistance	Current Electricity
Electrical Formula	Relation between resistance and length	Permittivity And Permeability
Power transformers	Difference Between Primary Cell and Secondary Cell	Cells in Series and in Parallel
Ohm’s law	Relation between kva and kw	Cells, emf, Internal Resistance
Types of Circuits	Resistivity Temperature Dependence	Unit of Specific Resistance
Wheatstone Bridge	Difference between air conditioning and refrigeration	Combination of Resistors
Resistivity formula	Derivation of Drift Velocity	Resistor Colour Codes
Types of Current	Difference Between Ammeter and Voltmeter	Unit of Current
Carbon Resistor	Difference between kva and kw	Resistance Formula
Types of Resistors	Difference between RTD and thermocouple	Current density formula
Ampere	Differences Between Acceleration and Velocity	Current Density
Static Electricity	Difference between earth and neutral	Power Of Alternating Current
Drift Velocity	Internal resistance formula	Ohm’s Law and its Limitations
Conductivity	Difference between emf and voltage	Physical Significance of Electric Field

CBSE CLASS XII Related Questions

1.
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.

2.
Capacitors are manufactured with certain standard capacitances and working voltages. However, these standard values may not be the ones that are actually needed in a particular application. Two or more capacitors can be grouped in series or in parallel to achieve desired capacitance and voltage. When connected in series, the total capacitance decreases while the voltage rating increases, whereas in parallel connections, the total capacitance increases and maintains the same voltage rating. A capacitor stores energy in the electric field between its plates and stored energy is proportional to the square of the voltage and capacitance $U = \frac{1}{2}CV^2$, where symbols have their usual meanings.
Two capacitors, one of $3 \ \mu$F and the other of $6 \ \mu$F, are connected in series in the circuit as shown in the figure, for a long time. }

3.
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.

View Solution

4.
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.

5.
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.

6.
Write two advantages of reflecting telescope over refracting telescope.

View Solution

State the Working Principle of a Potentiometer.

Related Questions

CBSE CLASS XII Related Questions

4.
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.

6.
Write two advantages of reflecting telescope over refracting telescope.

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

State the Working Principle of a Potentiometer.

Related Questions

CBSE CLASS XII Related Questions

4.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.

6.Write two advantages of reflecting telescope over refracting telescope.

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

4.
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.

6.
Write two advantages of reflecting telescope over refracting telescope.