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MCQ-4 This set of Class 12 Physics Chapter 14 Multiple Choice Questions & Answers (MCQs) focuses on “Semiconductor Electronics – p-n Junction”. 1. What will happen when a p-n diode is reversed-biased?a) No current flowsb) The depletion region is increasedc) The depletion region is reducedd) The height of the potential barrier is reduced Answer: bExplanation: … Read more
MCQ-3 This set of Class 12 Physics Chapter 14 Multiple Choice Questions & Answers (MCQs) focuses on “Extrinsic Semiconductor”. 1. On doping germanium metal, with a little amount of indium, what does one get?a) Intrinsic semiconductorb) Insulatorc) n-type semiconductord) p-type semiconductor Answer: dExplanation: Indium impurity in germanium produces p-type semiconductors. A trivalent impurity added to … Read more
MCQ-2 This set of Class 12 Physics Chapter 14 Multiple Choice Questions & Answers (MCQs) focuses on “Intrinsic Semiconductor”. 1. An intrinsic semiconductor, at the absolute zero temperature, behaves like which one of the following?a) Insulatorb) Superconductorc) n-type semiconductord) p-type semiconductor Answer: aExplanation: At the absolute zero temperature, an intrinsic semiconductor behaves like an insulator. … Read more
MCQ-1 This set of Class 12 Physics Chapter 14 Multiple Choice Questions & Answers (MCQs) focuses on “Semiconductor Electronics : Materials, Devices and Simple Circuits”. These MCQs are created based on the latest CBSE syllabus and the NCERT curriculum, offering valuable assistance for exam preparation. 1. The manifestation of the band structure in solids is … Read more
Practice Questions: Class 11 Physics MCQ – Units and Measurements 1. The number of base units for measuring physical quantities according to the SI system are ____a) 1b) 10c) 7d) 8Answer: cExplanation: There are 7 base units for measuring physical quantities according to the SI system. They are kilogram (kg) for mass, second (s) for … Read more
Q.1. Match List I with List II [(JEE Main 2023)] Choose the correct answer from the options given below: (1) A-I, B-III, C-IV, D-II (2) A-III, B-I, C-II, D-IV (3) A-II, B-IV, C-III, D-I (4) A-III, B-IV, C-I, D-II Q.2. The frequency (𝑣) of an oscillating liquid drop may depend upon radius (𝑟) of the drop, density … Read more
1. What is the unit of measurement of solid angle? Answer: 1 2. The magnitude of any physical quantity: Answer: 1 3. Newton-second is the unit of Answer: 3 4. Which of the following is not the unit of energy. Answer: 4 5. Candela is the unit of: Answer: 2 6. Universal time is based on: Answer: 3 7. Which of … Read more
Practice Questions 1. Which of the following force is the strongest force in nature?a) Electromagnetic forceb) Nuclear forcec) Weak forced) Gravitational force Answer: bExplanation: Nuclear force is the strongest force in the four fundamental forces of nature. The strong nuclear force is also known as strong nuclear interaction. 2. Who is the Father of Experimental … Read more
Alternating Current Class 12 Important Questions Very Short Answer Type Question 1.The instantaneous current and voltage of an a.c. circuit are given by i = 10 sin 300 t A and V = 200 sin 300 t V. What is the power dissipation in the circuit? (All India 2008)Answer: Question 2.The instantaneous current and voltage … Read more