Last updated on December 30th, 2022 at 10:53 am
If you’re studying for the CBSE Class 12 Physics exam, you’re probably in need of some good notes to study from. There are many websites online that offer free and paid notes, but finding the right one can be a bit tricky. Here are some tips to help you find the class 12 chemistry notes you need.
Electrical Charges and Fields
Table of Contents
The topic of electric charges and fields is important for class 12 students. They are often asked about it in competitive exams such as NEET. Having some knowledge about this subject will definitely help you score well in your exam. Here is a brief overview on the basics.
Electric charge is a scalar property of matter. It can be defined as a quantatable amount of positive or negative charges, such as a volt per metre or a millivolt. This quantatable quantity adds up like any other real number.
One of the most important aspects of an electric charge is its direction of force. An electric field, on the other hand, is an area surrounding a charge that produces forces on other electrically charged particles. These fields are associated with every point in space where a charge exists.
Magnetism and matter
Magnetism and matter in CBSE class 12 physics notes are a must-have resource for students studying this important subject. They cover many concepts and laws related to magnets and the matter.
Chapter 5 of the book focuses on magnetic properties of the earth. It explains the role of magnetic fields in nature and the effects of the Earth’s field on human beings. The magnitude of the Earth’s field varies from place to place on the surface of the planet.
Various applications of magnetism include the movement of cranes to lift heavy machines, and the power of electromagnets that are used to make electric bells. There are various factors involved in the occurrence of these phenomena.
There are different types of materials that are attracted by a magnetic field. These materials include paramagnetic substances with a positive X, and diamagnetic substances with a negative X. Diamagnetism is a weak form of magnetism that generates a small magnetic moment in the presence of an external magnetic field.
Electromagnetic waves
Electromagnetic Waves is one of the important chapters in the Physics curriculum. Electromagnetic waves are transverse waves that carry momentum and energy. The speed of the electromagnetic wave depends on the electric and magnetic properties of the medium.
Electromagnetic waves are formed by the accelerated motion of charges in wires. They are also used in radio communication systems. There are three different components of electromagnetic waves. These include the electric field component E, the magnetic field component B, and the electromagnetic field vector.
The energy of an electromagnetic wave is divided equally between the electric and magnetic fields. This is known as the Ampere-Maxwell law. It also predicts that the static electric field cannot propagate a wave of a finite wavelength.
Electromagnetic waves were first detected by Hertz in 1887. Maxwell later predicted that an accelerating charge would produce an electromagnetic wave. However, Maxwell’s theory was not complete until he added the displacement current.
Coulomb’s Law
Coulomb’s Law is a law of electrostatics that explains the strength of the electrostatic field. It states that the magnitude of an electrostatic force is directly proportional to the square of the distance between the two charges. The law is also known as Coulomb’s inverse-square law. This law is widely used in various measurement of attraction.
A charge is the positive or negative mass, charge, or volume of a substance. An object acquires a charge by a process known as quantization. For example, if you take a piece of paper and place it on a table, you will notice that its charge is one coulomb.
One of the most important uses of this law is to calculate the amount of force between two point charges. Since two point charges are relatively small in comparison to the distance between them, the equation of the Coulomb’s law is a useful tool for solving any electrical problem.
Wave optics
Wave optics is a branch of physical optics that deals with interference, polarization, diffraction, reflection and refraction. It explains the nature of light, including its interaction with rays of light and the laws of interference and refraction at interfaces.
Light is composed of small invisible elastic particles. These particles travel with high speeds in the source. They travel at a speed of 3 x 108 meters per second in a vacuum. The speed of light in a medium depends on the nature of that medium.
When waves pass through a slit, diffraction occurs. In the same way, if two waves line up at the crests of each wave, constructive interference occurs. Destructive interference occurs when two waves crests touch each other.
The NCERT textbook contains a chapter on wave optics. This chapter covers refraction of light using the Huygens Principle, the superposition principal, and conditions for interference.
