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Ashok0210
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Answer the following questions: (a) In any ac circuit, is the applied instantaneous voltage equal to the algebraic sum of the instantaneous voltages across the series elements of the circuit? Is the same true for rms voltage? (b) A capacitor is used in the primary circuit of an induction coil. (c) An applied voltage signal consists of a superposition of a dc voltage and an ac voltage of high frequency. The circuit consists of an inductor and a capacitor in series. Show that the dc signal will appear across C and the ac signal across L. (d) A choke coil in series with a lamp is connected to a dc line. The lamp is seen to shine brightly. Insertion of an iron core in the choke causes no change in the lamp’s brightness. Predict the corresponding observations if the connection is to an ac line. (e) Why is choke coil needed in the use of fluorescent tubes with ac mains? Why can we not use an ordinary resistor instead of the choke coil?

Class 12 Physics CBSE and UP Board Alternating Current Chapter-7 Exercise 7.22 Additional Exercise NCERT Solutions for Class 12 Physics Chapter 7 Question 22

2020-2021cbse and up boardclass 12 chapter-7 physicsclass 12 physicsncert class 12 alternating current
Ashok0210
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Class 12 Physics CBSE and UP Board Alternating Current Chapter-7 Exercise 7.20 Additional Exercise NCERT Solutions for Class 12 Physics Chapter 7 Question 20

2020-2021cbse and up boardclass 12 chapter-7 physicsclass 12 physicsncert class 12 alternating current
Ashok0210
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Class 12 Physics CBSE and UP Board Alternating Current Chapter-7 Exercise 7.1 Additional Exercise NCERT Solutions for Class 12 Physics Chapter 7 Question 1

2020-2021cbse and up boardclass 12 chapter-7 physicsclass 12 physicsncert class 12 alternating current
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