Ncert Solutions Physics Class 12th
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11 months agoContributor-Level 10
According to Shiksha's electric charges and fields class 12 notes, Coulomb's law states that if there are two stationary point charges, the electrostatic force between them is inversely proportional to the square of the distance between them and directly proportional to the product of the charges.
Mathematically,
F = (1 / 4? ) * (q? / r²)
Here r is the distance between the charges, q? and q? are charges and? is the permittivity of free space. Coulomb's law assumes charges are at rest and it is valid for point charges in vacuum or air. When the medium is not a vacuum and the charges are moving, the limitations include inaccuracy. This la
New answer posted
11 months agoContributor-Level 10
The quantization of charge can be denoted as e = 1.6 * 10? ¹? C. It means that the object's charge is an integral multiple of the elementary charge. Mathematically, it can be represented as q = ±ne, where n is an integer. The charge exists in discrete packets or quanta and is not continuous. For example, a body cannot have a charge of 2.5e but a charge of 3e or -2e. Millikan first observed this quantization of charge in his oil drop experiment. Quantization is consistent with the matter's atomic structure and is a fundamental property of electric charge.
New answer posted
11 months agoContributor-Level 10
Conductors refer to materials that throughout their structure, allow the free movement of electric charges normally electrons. It happens because of the free electrons present in their outer shells. The examples of conductors include silver, aluminum and copper. On the other hand, there is no free flow of electric charges in the insulators because the electrons are tightly bound to atoms. Examples of the insulators are wood, rubber, and plastic. In electric circuits, the conductors are used as the wiring for the efficient transmission of electricity, and the insulators are used to provide safety by preventing the unwanted flow of curre
New question posted
11 months agoNew answer posted
11 months agoContributor-Level 10
The concept of continuity is defined for a function as a curve that is smooth and unbroken at every point in its domain. Mathematically, a function is said to be continuous at a point if:
What it means:
The function is defined at ,
The limit of the function exists as approaches ,
And the limit is equal to the function's value at that point.
Students can check the NCERT Class 12 Maths Chapter 5 Continuity and Differentiability for better and deep understanding of the topic.
New answer posted
11 months agoContributor-Level 10
Students can use the Class 12 Electrochemistry notes to prepare for the exam and quick revision.
New answer posted
11 months agoContributor-Level 10
Students can download the Classification of metal conductors & semiconductor notes provided by the Shiksha experts through this article.
New answer posted
11 months agoContributor-Level 10
Semiconductor is a material that can act as a conductor or an insulator based on its properties. There are two types of semiconductors: Intrinsic and Extrinsic semiconductors.
New answer posted
11 months agoContributor-Level 10
In p-type doping a special atom is added called acceptors to a pure semiconductor, such as Silicon, to increase the number of holes where electrons are missing. For instance, each Silicon atom has 4 valence electrons to which you add a dopant that has 3 valence electrons, say Boron, which has 1 less electron than silicon. In this case, Boron will try to bond with 4 neighbouring atoms, but Boron has one less electron. This missing electron will be the hold. These holes can move when voltage is applied, and the semiconductor will conduct through holes instead of electrons.
New answer posted
12 months agoContributor-Level 10
The chapter consists of fundamental topics that are important for board exams preparation as well as for competitive tests:
Composition and Size of the Nucleus: Understanding protons, neutrons, and nuclear density.
Nuclear Force: The forces that hold the nucleus together.
Mass-Energy Equivalence (E = mc²): Einstein's equation and its significance in nuclear reactions.
Nuclear Binding Energy: Understanding nuclear stability and energy release.
Radioactivity: Concepts of alpha, beta, and gamma decay.
Laws of Radioactive Decay: Half-life, mean life, and decay constant derivations.
Nuclear Fission and Fusion: Their
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