12th Standard Syllabus & Materials
12th Standard
TN 12th Computer Applications மின்னணு தரவு பரிமாற்றம் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications மின் - வணிக பாதுகாப்பு அமைப்புகள் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications மின்னணு செலுத்தல் முறைகள் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications மின் - வணிகம் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications திறந்த மூல கருத்துருக்கள் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications வலையமைப்பு வடமிடல் Sample Question Papers Study Material - QB365 Set A
Published on: 13/05/2022
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Download Tamil Nadu 12th Standard Physics question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Physics Test1.
If the intensity of radiation in a photocell is increased how does the stopping potential vary?
2.
Define intensity of radiation on the basis of photon picture of light. Write its SI unit.
3.
The stopping potential in an experiment on photoelectric effect is 2V. What is the maximum kinetic energy of the photoelectrons emitted?
4.
Define the term 'stopping potential' in relation to photoelectric effect.
5.
Work function of aluminium is 4.2 eV. If two photons, each of energy 2.5 eV, are incident on It surtace, will the emission of electrons take place? Justify your answer
1.
The stopping potential does not depend on the intensity of incident radiation; so stopping potential will remain unchanged.
2.
The amount of light energy or photon energy incident per meter square per second is called the intensity of radiation.
SI unit: \(\frac { W }{ { m }^{ 2 } } \) or J/s-m2.
3.
Maximum kinetic energy, (Ek)max = eVs = e(2V) = 2eV
4.
The minimum retarding (negative) potential of anode of a photoelectric tube fro which photoelectric current stops or becomes zero is called the stopping potential.
5.
In photoelectric effect, a single photon interacts with a single electron. As individual photo has energy (2.5 eV) which is less than work function, hence emission of electron will not take place.
12th Standard Syllabus & Materials
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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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