12th Physics Chapter 5 Important Questions
12 ஆம் வகுப்பு இயற்பியல் பாடம் வாரியான முக்கியமான வினாக்கள்
12th Physics Chapter Wise Important Questions
12th Physics board exams, focusing on chapter-wise important questions is a strategic way to ensure high marks. Key areas include Electrostatics (Coulomb’s law and Gauss theorem), Current Electricity (Kirchhoff’s laws and Wheatstone bridge), and Electromagnetic Induction (Transformer and AC generator). In the latter half of the syllabus, Optics (lens maker’s formula) and Modern Physics (half-life and nuclear reactors) are essential for 5-mark sections. Mastering these high-weightage topics, along with practicing previous year question papers and numerical problems, helps students build conceptual clarity and time management skills for the final exam.
12-ஆம் வகுப்பு இயற்பியல்: முக்கிய வினாக்கள். 12-ஆம் வகுப்பு இயற்பியல் தேர்வில் அதிக மதிப்பெண்கள் (Centum) பெற, மாணவர்கள் பாடவாரியாக உள்ள முக்கியமான வினாக்களில் அதிக கவனம் செலுத்த வேண்டும்.
12th Physics Important Questions – CHAPTER 5
12th Physics Chapter 5 Important – 2 Marks
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1. What is displacement current? (MAY 22)
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2. What are electromagnetic waves? (MAR 24)
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3. Write down the integral form of modified Ampere‟s circuital law.
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4. Write notes on Gauss’ law in magnetism.
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5. Give two uses each of (i) IR radiation, (AUG 21,JUNE 24) (ii) Microwaves and (iii) UV radiation (JULY 22)
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6. Write notes on Ampere-Maxwell law.
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7. Why are e.m. waves non-mechanical?
12th Physics Chapter 5 Important – 3 Marks
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1. What are Fraunhofer lines? How are they useful in the identification of elements present in the Sun? (MAR 23)
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2. Write short notes on (a) microwave (b) X-ray (c) radio waves (d) visible spectrum.
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3. Discuss the Hertz experiment.
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4. Discuss the source of electromagnetic waves.
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5. Compute the speed of the electromagnetic wave in a medium if the amplitude of electric and magnetic
fields are 3×104 NC–1 and 2×10–4 T, respectively. (Example 5.3) (SEP 20, MAR 23)
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6. The relative magnetic permeability of the medium is 2.5 and the relative electrical permittivity of the medium is 2.25. Compute the refractive index of the medium. (Exam 5.2) (JULY 22)
12th Physics Chapter 5 Important – 5 Marks
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1. Write down Maxwell equations in integral form. (MAR 20, AUG 21, JUNE 23,24)
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2. Write down the properties of electromagnetic waves. (SEP 20, JULY 22, MAR 23,25, JUNE 24)
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3. What is spectrum? What is emission spectrum? Explains its types. (MAY 22)
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4. What is absorption spectrum? Explains its types. (JUNE 23,MAR 25)
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5. Explain the Maxwell‟s modification of Ampere‟s circuital law. (MAR 24)
