NCERT Solutions For Class 11 Physics Chapter 2: Units and Measurements

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NCERT Solutions for Class 11 Physics Chapter 2 Units and Measurements deals with the various units of measurement. Measurement is a fundamental concept in science. Without the ability to measure, a theory or experiments cannot be deduced.

Chapter 2 Units and Measurements along with Unit 2 Kinematics and Unit 3 Laws of Motion has a weightage of 23 marks in the CBSE Class 11 Physics Examination. NCERT Solutions for Units and Measurements deal with the conversion of various units, conservation laws in physics, and fundamental forces in nature.

Download PDF: NCERT Solutions for Class 11 Physics Chapter 2

NCERT Solutions for Class 11 Physics Chapter 2

The NCERT Solutions for Chapter 2 Physics for Class 11 are as given below –

NCERT SOLUTIONS

NCERT SOLUTION

NCERT SOLUTION \

NCERT SOLUTION

Class 11 Physics Chapter 2 – Concepts Covered

To measure a physical quantity, we have to find how many times a standard amount of that quantity is present in the measured quantity. The number obtained is the magnitude and the standard chosen to represent it is the unit of the physical quantity.

The unit is a chosen standard that is widely accepted and in terms of which the other quantities are measured.

To express a measurement, the numerical value (n) and the unit (μ) of the quantity are needed.

Measurement of physical quantity = Numerical value x Unit

Fundamental Units do not require any other physical quantity to express them. They cannot be resolved further.

For example, in MKS system, the Mass, Length and Time which are expressed in kilogram, metre and second respectively are known as fundamental units.

Earlier different systems of units were followed to measure the quantities. Nowadays, the SI system is widely used.

As per SI Unit System,

Length – metre
Mass – kilogram
Time – second
Electric Current – Ampere
Thermodynamic temperature – Kelvin
Amount of substance – Mole
Luminous intensity – Candela

The dimensions of a physical quantity refer to the powers to which the fundamental units must be raised to represent a given physical quantity.

The dimensional formula is an expression demonstrating how the fundamental quantities enter into the unit of that quantity.

Class 11 Physics Chapter 2 Related Guides –

Fundamental and Derived Units of Measurement	Least count error	Precision of a measurement
Dimensional Analysis	Measurement of length	Measurement of mass
Micrometer	Screw Gauge	Unit of Force
Unit of Acceleration	Unit of Velocity	Unit of Momentum
Unit of Mass	Unit of Volume	Unit of Length

Class 11 Physics Study Guides:

NCERT Solutions for Class 11 Physics	Physics Formula	Physics Study Notes
Difference between in Physics	Relation between articles in Physics	SI Units in Physics
Derivations in Physics	Physics Constants	Class 11 Physics Notes

CBSE CLASS XII Related Questions

1.
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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2.
The resistance of a metal wire at $ 20^\circ \text{C} $ is $ 1.05 \, \Omega $ and at $ 100^\circ \text{C} $ is $ 1.38 \, \Omega $. Determine the temperature coefficient of resistivity of this metal.

View Solution

3.
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.

4.
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.

5.
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.
With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.

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NCERT Solutions For Class 11 Physics Chapter 2: Units and Measurements

NCERT Solutions for Class 11 Physics Chapter 2

Class 11 Physics Chapter 2 – Concepts Covered

CBSE CLASS XII Related Questions

2.
The resistance of a metal wire at \( 20^\circ \text{C} \) is \( 1.05 \, \Omega \) and at \( 100^\circ \text{C} \) is \( 1.38 \, \Omega \). Determine the temperature coefficient of resistivity of this metal.

5.
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.
With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.

Similar Physics Concepts

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NCERT Solutions For Class 11 Physics Chapter 2: Units and Measurements

NCERT Solutions for Class 11 Physics Chapter 2

Class 11 Physics Chapter 2 – Concepts Covered

CBSE CLASS XII Related Questions

2. The resistance of a metal wire at \( 20^\circ \text{C} \) is \( 1.05 \, \Omega \) and at \( 100^\circ \text{C} \) is \( 1.38 \, \Omega \). Determine the temperature coefficient of resistivity of this metal.

5.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.With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

2.
The resistance of a metal wire at \( 20^\circ \text{C} \) is \( 1.05 \, \Omega \) and at \( 100^\circ \text{C} \) is \( 1.38 \, \Omega \). Determine the temperature coefficient of resistivity of this metal.

5.
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.
With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.