A 1m potentiometer wire (PQ) is joined to a standard cell E1. Another cell E2 (emf 1.02 V) is joined with resistance ‘r’ and switch S. With the switch open, the null position is acquired at a distance of 49 cm from Q. Find potential gradient in the potentiometer wire.

A potentiometer can be represented as a three-terminal resistor with either rotating or sliding contact that develops an adjustable voltage divider. As per the given question:

Potentiometer

PQ= 1 m
QJ = 49 cm
PJ = 51 cm

⇒ V/l = 1.02/51 = 0.02 v/cm

Related Questions

Also Check:

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

CBSE CLASS XII Related Questions

1.
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. }

2.
An astronomical telescope consists of two converging lenses. One of them of large aperture and large focal length is called objective lens and the other one, of smaller focal length and smaller aperture is called the eyepiece. It is used to see distant objects which are not seen clearly with naked eyes. The image formed by the objective lens acts as an object for the eyepiece and the final image produced by the eyepiece is magnified.

3.
Derive an expression for the capacitance of a parallel plate capacitor of plate area A and plate separation d with air present between the plates.

View Solution

4.
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

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.
Consider the nuclear reaction $ X \to Y + Z $. Let $ M_x $, $ M_y $, and $ M_z $ be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

$ (M_x - M_z)<M_y $
$ (M_x - M_y)<M_z $
$ M_x>(M_y + M_z) $
$ M_x<(M_y + M_z) $

View Solution

A 1m potentiometer wire (PQ) is joined to a standard cell E1. Another cell E2 (emf 1.02 V) is joined with resistance ‘r’ and switch S. With the switch open, the null position is acquired at a distance of 49 cm from Q. Find potential gradient.

Related Questions

CBSE CLASS XII Related Questions

3.
Derive an expression for the capacitance of a parallel plate capacitor of plate area A and plate separation d with air present between the plates.

6.
Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

A 1m potentiometer wire (PQ) is joined to a standard cell E1. Another cell E2 (emf 1.02 V) is joined with resistance ‘r’ and switch S. With the switch open, the null position is acquired at a distance of 49 cm from Q. Find potential gradient.

Related Questions

CBSE CLASS XII Related Questions

3.Derive an expression for the capacitance of a parallel plate capacitor of plate area A and plate separation d with air present between the plates.

6.Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

3.
Derive an expression for the capacitance of a parallel plate capacitor of plate area A and plate separation d with air present between the plates.

6.
Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?