2nd year physics, Chapter 15: Electromagnetic induction – Exercise questions; (MARKS GUARANTEED) скачать в хорошем качестве

2nd year physics, Chapter 15: Electromagnetic induction – Exercise questions; (MARKS GUARANTEED)

Hi 2nd year physics students take full marks in FSC part 2 Physics This lecture is on chapter 15 Exercise question and answers. These answers are easy conceptual and effective. Every question and answer is explained in detail. This lecture is for students of FSC physics from Punjab text book board. These are the questions which are covered in the video from 15.11 to 15.18. These are the questions. 15.11: When an electric motor, such as an electric drill, is being used , does it also act as a generator? If so what is consequence of it? 15.12: Can a D.C. motor be turned into a D.C. generator? What changes are required to be done? 15.13: Is it possible to change both the area of the loop and the magnetic field passing through the loop and still not have an induced emf in the loop? 15.14: Can an electric motor be used to drive an electric generator with the output from the generator being used to operate motor? 15.15: A suspended magnet is oscillating freely in a horizontal plane. The oscillations are strongly damped when a metal plate is placed under the magnet. Explain why this occur? 15.16: Four unmarked wires emerge from transformer. What steps would you take to determine the turn ratio? 15.17 a): Can a step-up transformer increase the power level? 15.17 b): In a transformer how power is transferred from primary to secondary coil? 15.18 a): When primary of a transformer is connected to ac mains the current in it is very small if the secondary circuit is open. 15.18 b): When primary of a transformer is connected to ac mains the current in it increases if the secondary circuit is closed. For answers watch the complete video.