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Electromagnetic Waves

Madhya Pradesh Board · Class 12 · Physics

Flashcards for Electromagnetic Waves — Madhya Pradesh Board Class 12 Physics. Quick Q&A cards covering key concepts, definitions, and formulas.

100 questions72 flashcards5 concepts

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72 Flashcards
Card 1Ampere's law

मूल Ampere का परिपथीय नियम बताइए।

Answer

मूल Ampere का परिपथीय नियम है: ∮ B · dl = μ0 i(t) अर्थ: किसी बंद लूप के चारों ओर चुंबकीय क्षेत्र उसमें से गुजरने वाली धारा पर निर्भर करता है। इकाइयाँ: B tesla में, dl metre में, i ampere में। त्वरित ट

Card 2Ampere's law

State the original Ampere's circuital law.

Answer

Original Ampere's circuital law is: ∮ B · dl = μ0 i(t) Meaning: The magnetic field around a closed loop depends on the current passing through it. Units: B in tesla, dl in metre, i in ampere. Quick no

Card 3Displacement current

Why was displacement current introduced?

Answer

A charging capacitor creates a situation where one surface gives current through the wire, while another surface between the plates gives no conduction current. To remove this inconsistency, Maxwell i

Card 4Displacement current

विस्थापन धारा को क्यों introduced किया गया?

Answer

एक charging capacitor ऐसी स्थिति बनाता है जहाँ एक सतह wire के through धारा देती है, जबकि plates के बीच वाली दूसरी सतह पर कोई conduction current नहीं होता। इस असंगति को दूर करने के लिए Maxwell ने विस्थ

Card 5Electric flux

capacitor plates के बीच विद्युत फ्लक्स का सूत्र बताइए।

Answer

capacitor surface से होकर विद्युत फ्लक्स है: Φ_E = |E| A = (1/ε0)(Q/A)A = Q/ε0 अर्थ: फ्लक्स plates पर मौजूद charge Q पर निर्भर करता है। इकाइयाँ: Φ_E N m²/C में, Q coulomb में, ε0 C² N⁻¹ m⁻² में।

Card 6Electric flux

State the formula for electric flux between capacitor plates.

Answer

Electric flux through the capacitor surface is: Φ_E = |E| A = (1/ε0)(Q/A)A = Q/ε0 Meaning: flux depends on the charge Q on the plates. Units: Φ_E in N m²/C, Q in coulomb, ε0 in C² N⁻¹ m⁻².

Card 7Displacement current numerical

A capacitor has charge changing at 2.0 C/s. Find the displacement current.

Answer

Given: dQ/dt = 2.0 C/s Formula: i_d = ε0 dΦ_E/dt From Φ_E = Q/ε0, we get: ε0 dΦ_E/dt = dQ/dt So: i_d = 2.0 A Answer: 2.0 A Unit check: current is measured in ampere.

Card 8Displacement current numerical

एक capacitor में charge 2.0 C/s की दर से बदल रहा है। विस्थापन धारा ज्ञात कीजिए।

Answer

दिया है: dQ/dt = 2.0 C/s सूत्र: i_d = ε0 dΦ_E/dt Φ_E = Q/ε0 से, हमें मिलता है: ε0 dΦ_E/dt = dQ/dt अतः: i_d = 2.0 A उत्तर: 2.0 A इकाई जाँच: धारा को ampere में मापा जाता है।

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Frequently Asked Questions

What are the important topics in Electromagnetic Waves for Madhya Pradesh Board Class 12 Physics?
Electromagnetic Waves covers several key topics that are frequently asked in Madhya Pradesh Board Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Electromagnetic Waves — Madhya Pradesh Board Class 12 Physics?
Understand the core concepts first, then work through the 100 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
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