Cat

Chapter 4  ✅ Exercise 4.1 ✦ Question 4.1 A circular coil of 100 turns and radius 10 cm carries a current of 5 A. Find the magnetic field at the centre of the coil. Given: N = 100 R = 10 cm = 0.1 m I = 5 A μ₀ = 4π × 10⁻⁷ T m/A ✦ English Solution Magnetic field at centre of circular coil: B = (μ₀ N I) / (2R) Substitute values: B = (4π × 10⁻⁷ × 100 × 5) / (2 × 0.1) B = (4π × 10⁻⁷ × 500) / 0.2 B = (2000π × 10⁻⁷) / 0.2 B = 10000π × 10⁻⁷ B = π × 10⁻³ T B ≈ 3.14 × 10⁻³ T Final Answer: Magnetic field at centre = 3.14 × 10⁻³ Tesla ✦ हिन्दी समाधान वृत्ताकार कुंडली के केन्द्र पर चुंबकीय क्षेत्र: B = (μ₀ N I) / (2R) मान रखकर: B = (4π × 10⁻⁷ × 100 × 5) / (2 × 0.1) हल करने पर: B = 3.14 × 10⁻³ Tesla अन्तिम उत्तर: केन्द्र पर चुंबकीय क्षेत्र = 3.14 × 10⁻³ टेस्ला✅  Exercise 4.2  ✦ Question 4.2 A circular coil of radius 10 cm and 500 turns carries a current of 2 A. Find the magnetic field at its centre. Given: N = 500 R = 10 cm = 0.1 m I = 2 A μ₀ = 4π × 10⁻⁷ T m/A ✦ English Solution Magneti...

--- CHAPTER 3 – CURRENT ELECTRICITY Q 3.1 (English): The storage battery of a car has an emf of 12 V. If the internal resistance of the battery is 0.4 Ω, what is the maximum current that can be drawn from the battery? प्रश्न 3.1 (Hindi): एक कार की बैटरी का विद्युत वाहक बल 12 V है। यदि बैटरी का आंतरिक प्रतिरोध 0.4 Ω है, तो उससे अधिकतम कितनी धारा ली जा सकती है? Solution: Given: E = 12 V r = 0.4 Ω Formula: Imax = E / r I = 12 / 0.4 I = 30 A Final Answer: Maximum Current = 30 A अधिकतम धारा = 30 A --- Q 3.2 (English): A battery of emf 10 V and internal resistance 3 Ω is connected to a resistor. If the current in the circuit is 0.5 A, what is the resistance of the resistor? What is the terminal voltage of the battery? प्रश्न 3.2 (Hindi): 10 V विद्युत वाहक बल और 3 Ω आंतरिक प्रतिरोध वाली बैटरी एक प्रतिरोध से जुड़ी है। यदि धारा 0.5 A है, तो प्रतिरोध का मान ज्ञात करें। साथ ही टर्मिनल वोल्टेज ज्ञात करें। Solution: Given: E = 10 V r = 3 Ω I = 0.5 A Formula: E = I(R + r) 10 = 0.5(R + 3) 10 = 0.5R +...

Class xii  Subject :- Chemistry  CHAPTER :- ALCOHOL, PHENOL AND ETHER  INTEXT QUESTIONS  Question 7.1 Classify the following compounds into primary, secondary and tertiary alcohols — (i) (CH₃)₃C–CH₂OH (ii) H₂C = CH–CH₂OH (iii) CH₃–CH₂–CH₂–OH (iv) C₆H₅–CH(OH)–CH₃ (v) C₆H₅–CH₂–CH(OH)–CH₃ (vi) C₆H₅–CH = CH–C(OH)(CH₃)₂ Answer — Primary (1°) alcohols (i), (ii), (iii) Secondary (2°) alcohols (iv), (v) Tertiary (3°) alcohol (vi) प्रश्न  निम्नलिखित यौगिकों को प्राथमिक, द्वितीयक एवं तृतीयक ऐल्कोहॉल में वर्गीकृत कीजिए — (i) (CH₃)₃C–CH₂OH (ii) H₂C = CH–CH₂OH (iii) CH₃–CH₂–CH₂–OH (iv) C₆H₅–CH(OH)–CH₃ (v) C₆H₅–CH₂–CH(OH)–CH₃ (vi) C₆H₅–CH = CH–C(OH)(CH₃)₂ उत्तर — प्राथमिक (1°) ऐल्कोहॉल (i), (ii), (iii) द्वितीयक (2°) ऐल्कोहॉल (iv), (v) तृतीयक (3°) ऐल्कोहॉल (vi) Question 7.2 Identify the allylic alcohol from the above examples — Answer — An allylic alcohol is one in which the –OH group is attached to a carbon atom adjacent to a carbon–carbon double bond. Among the given compoun...