12th Standard Syllabus & Materials
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Published on: 18/06/2021
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Questions + Answers key
Take MCQ Physics Test1.
Write the Similarities between Coulomb's law and Biot-Savort's law.
2.
State the factors on which the current sensitivity of a galvanometer is increased.
3.
When is a galvanometer said to be sensitive?
4.
What is Cyclotron? State the principle of Cyclotron.
5.
What is magnetic Lorentz force?
1.
(i) Obey inverse square law, so they are long-range fields.
(ii) obey the principle of superposition and are linear with respect to source in magnitude,
E ∝ q
B ∝ Idl
2.
(i) The number of turns N.
(ii) The magnetic induction B.
(iii) The area of coil A.
3.
The galvanometer is said to be sensitive if it shows large scale deflection even though a small current is passed through it or a small voltage is applied across it.
4.
Cyclotron is a device used to accelerate the charged particles to gain large kinetic energy. It is also called as high energy accelerator.
Principle : When a charged particle moves normal to the magnetic field, it experiences magnetic Lorentz force.
5.
When an electric charge q is kept at rest in a magnetic field, no force acts on it. At the same time, if the charge moves in the magnetic field, it experiences a force. This force is different from Coulomb's force. This force is known as magnetic Lorentz force
\(\vec { F } =q(\vec { v } \times \vec { B } )\)
In general, if the charge is moving in both the electric and magnetic fields, the total force experienced by the charge is given by \(\vec { F } =q(\vec { v } \times \vec { B } )q\vec { E } \) . It is known as Lorentz force.
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Tamilnadu Stateboard 12th Standard Subjects
Maths
Chemistry
Physics
Biology
Computer Science
Business Maths and Statistics
Economics
Commerce
Accountancy
History
Computer Applications
Biology
Computer Technology
Computer Applications
Computer Science
Business Maths and Statistics
Commerce
Economics
Maths
Chemistry
Physics
Computer Technology
History
Accountancy
Tamil
English
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