Search this site
Embedded Files
Skip to main content
Skip to navigation
Little shop of physics
Home
About us
Units and measurement
1.1 Introduction
1.2 System of unit
1.2.1 Fundamental Quantities and Units
1.2.2 Derived Quantities and Units
1.2.3 Conventions for the use of SI Units
1.3 Measurement of length
1.3.1 Measurements of Large Distance
1.3.2 Measurement of Distance to Stars
1.3.3 Measurement of the Size of a Planet or a Star
1.3.4 Measurement of Very Small Distances
1.4 Measurement of mass
1.5 Measurement of time
1.6 Dimensions and dimensional analysis
1.7 Accuracy, precision & uncertainty in measurement
1.8 Errors in measurement
1.9 Significant error
Activity
Can you tell?
Quiz
Motion in a plane
2.1 Introduction
2.2 Rectilinear motion
2.3 Motion in two dimensions- motion in a plane
2.3.1 Average and Instantaneous Velocities:
2.3.2 Average and Instantaneous Acceleration
2.3.3 Motion for an Object travellinging a Plane with Uniform acc.
2.3.4 Relative Velocity
2.3.5 Projectile Motion
2.4 Uniform circular motion
Always Remember
Do you know
Quiz
Sound
3.1 Introduction
3.2 Common Properties of all Waves
3.3 Transverse Waves and Longitudinal Waves
3.4 The Speed of Travelling Waves
3.5 Principle of Superposition of Waves
3.6 Echo, reverberation and acoustics
3.7 Qualities of sound
3.8 Doppler Effect
Always remember
Do you know?
Activity
Quiz
Magnetism
4.1 Introduction
4.2 Magnetic Lines of Force and Magnetic Field
4.3 The Bar magnet
4.4 Gauss' Law of Magnetism
4.5 Earth’s Magnetism
Do you know ?
Try this
Quiz
EM waves & communication system
5.1 Introduction
5.2 EM wave
5.2.1 Sources of EM waves
5.2.2 Characteristics of EM waves
5.3 Electromagnetic Spectrum
5.3.1 Radio waves
5.3.2 Microwaves
5.3.3 Infrared waves
5.3.4 Visible light
5.3.5 Ultraviolet rays
5.3.6 X-rays
5.3.7 Gamma Rays
5.4 Propagation of EM Waves
5.4.1 Ground (surface) wave
5.4.2 Space wave
5.4.3 Sky wave propagation
5.5 Introduction to Communication System
5.5.1 Elements of a communication system
5.5.2 Commonly used terms in electronic communication system
5.6 Modulation
Do you know?
Quiz
References
Contact us
Little shop of physics
Home
About us
Units and measurement
1.1 Introduction
1.2 System of unit
1.2.1 Fundamental Quantities and Units
1.2.2 Derived Quantities and Units
1.2.3 Conventions for the use of SI Units
1.3 Measurement of length
1.3.1 Measurements of Large Distance
1.3.2 Measurement of Distance to Stars
1.3.3 Measurement of the Size of a Planet or a Star
1.3.4 Measurement of Very Small Distances
1.4 Measurement of mass
1.5 Measurement of time
1.6 Dimensions and dimensional analysis
1.7 Accuracy, precision & uncertainty in measurement
1.8 Errors in measurement
1.9 Significant error
Activity
Can you tell?
Quiz
Motion in a plane
2.1 Introduction
2.2 Rectilinear motion
2.3 Motion in two dimensions- motion in a plane
2.3.1 Average and Instantaneous Velocities:
2.3.2 Average and Instantaneous Acceleration
2.3.3 Motion for an Object travellinging a Plane with Uniform acc.
2.3.4 Relative Velocity
2.3.5 Projectile Motion
2.4 Uniform circular motion
Always Remember
Do you know
Quiz
Sound
3.1 Introduction
3.2 Common Properties of all Waves
3.3 Transverse Waves and Longitudinal Waves
3.4 The Speed of Travelling Waves
3.5 Principle of Superposition of Waves
3.6 Echo, reverberation and acoustics
3.7 Qualities of sound
3.8 Doppler Effect
Always remember
Do you know?
Activity
Quiz
Magnetism
4.1 Introduction
4.2 Magnetic Lines of Force and Magnetic Field
4.3 The Bar magnet
4.4 Gauss' Law of Magnetism
4.5 Earth’s Magnetism
Do you know ?
Try this
Quiz
EM waves & communication system
5.1 Introduction
5.2 EM wave
5.2.1 Sources of EM waves
5.2.2 Characteristics of EM waves
5.3 Electromagnetic Spectrum
5.3.1 Radio waves
5.3.2 Microwaves
5.3.3 Infrared waves
5.3.4 Visible light
5.3.5 Ultraviolet rays
5.3.6 X-rays
5.3.7 Gamma Rays
5.4 Propagation of EM Waves
5.4.1 Ground (surface) wave
5.4.2 Space wave
5.4.3 Sky wave propagation
5.5 Introduction to Communication System
5.5.1 Elements of a communication system
5.5.2 Commonly used terms in electronic communication system
5.6 Modulation
Do you know?
Quiz
References
Contact us
More
Home
About us
Units and measurement
1.1 Introduction
1.2 System of unit
1.2.1 Fundamental Quantities and Units
1.2.2 Derived Quantities and Units
1.2.3 Conventions for the use of SI Units
1.3 Measurement of length
1.3.1 Measurements of Large Distance
1.3.2 Measurement of Distance to Stars
1.3.3 Measurement of the Size of a Planet or a Star
1.3.4 Measurement of Very Small Distances
1.4 Measurement of mass
1.5 Measurement of time
1.6 Dimensions and dimensional analysis
1.7 Accuracy, precision & uncertainty in measurement
1.8 Errors in measurement
1.9 Significant error
Activity
Can you tell?
Quiz
Motion in a plane
2.1 Introduction
2.2 Rectilinear motion
2.3 Motion in two dimensions- motion in a plane
2.3.1 Average and Instantaneous Velocities:
2.3.2 Average and Instantaneous Acceleration
2.3.3 Motion for an Object travellinging a Plane with Uniform acc.
2.3.4 Relative Velocity
2.3.5 Projectile Motion
2.4 Uniform circular motion
Always Remember
Do you know
Quiz
Sound
3.1 Introduction
3.2 Common Properties of all Waves
3.3 Transverse Waves and Longitudinal Waves
3.4 The Speed of Travelling Waves
3.5 Principle of Superposition of Waves
3.6 Echo, reverberation and acoustics
3.7 Qualities of sound
3.8 Doppler Effect
Always remember
Do you know?
Activity
Quiz
Magnetism
4.1 Introduction
4.2 Magnetic Lines of Force and Magnetic Field
4.3 The Bar magnet
4.4 Gauss' Law of Magnetism
4.5 Earth’s Magnetism
Do you know ?
Try this
Quiz
EM waves & communication system
5.1 Introduction
5.2 EM wave
5.2.1 Sources of EM waves
5.2.2 Characteristics of EM waves
5.3 Electromagnetic Spectrum
5.3.1 Radio waves
5.3.2 Microwaves
5.3.3 Infrared waves
5.3.4 Visible light
5.3.5 Ultraviolet rays
5.3.6 X-rays
5.3.7 Gamma Rays
5.4 Propagation of EM Waves
5.4.1 Ground (surface) wave
5.4.2 Space wave
5.4.3 Sky wave propagation
5.5 Introduction to Communication System
5.5.1 Elements of a communication system
5.5.2 Commonly used terms in electronic communication system
5.6 Modulation
Do you know?
Quiz
References
Contact us
1.1 Introduction
- Physics is a quantitative science, where we measure various physical quantities during experiments.
- In our day to day life, we need to measure a number of quantities,
e.g., size of objects, volume of liquids, amount of matter, weight of vegetables or fruits, body temperature, length of cloth, etc.
- A measurement always involves a comparison with a standard measuring unit which is internationally accepted.
- For example, for measuring the mass of a given fruit we need standard mass units of 1 kg, 500 g, etc.
- These standards are called units.
- The measured quantity is expressed in terms of a number followed by a corresponding unit,
e.g., the length of a wire is written as 5 m where m (meter) is the unit and 5 is the value of the length in that unit.
- Different quantities are measured in different units,
e.g. length in meter (m), time in seconds (s), mass in kilogram (kg), etc.
- The standard measure of any quantity is called the unit of that quantity.
Report abuse
Page details
Page updated
Report abuse