Physics Revision Notes for Class 12 for Chapter 7 Alternating Current

So far, in previous chapters, we considered dc sources that do not vary with time. In this chapter, we discuss the voltages and currents that vary with time known as alternating voltage. Today, most of the electrical appliances make use of AC voltage including the electric mains supply in our homes and offices. An AC voltage is preferred over a DC voltage because an AC voltage can be efficiently and easily converted from one voltage level to another by means of transformers. And also it can be transmitted over long distances economically. In chapter 7 Alternating current of CBSE class 12 physics, learn about AC voltages in detail and how characteristics exhibited by ac circuits are exploited by devices of daily use. Provided here is the class 12 physics chapter 7 revision notes pdf which can be downloaded for free

Download the CBSE class 12 Physics revision notes for chapter 7 alternating current pdf here.

Class 12 Physics Chapter 7 Alternating Current
Class 12 Physics Chapter 7 Alternating Current
Class 12 Physics Chapter 7 Alternating Current
Class 12 Physics Chapter 7 Alternating Current

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Practise This Question

The equation of a wave travelling on a string is y=4 sin(4πtπ16x)  if x and y are in centimetres, then velocity of wave is