Question 7: What is galvanometer? How it is converted into an ammeter and a voltmeter? Answer Definition of Galvanometer “A moving coil galvanometer is an…
Question: What is A.C motor? Explain the construction and working of A.C motor. ANSWER A.C motor An A.C Motor is the machine that converts electric…
Question 9: What is transformer? Give its principle, mathematical relationship. Also explain why laminated iron core is used instead of solid iron? ANSWER Transformer The…
Question 10: Explain the back emf in an electric motor. ANSWER Back emf in electric motor An electric motor has the same design as that…
Question 6: What is motional emf? Show that motional induced emf = Blv. ANSWER Definition of Motional emf “Motional emf is the emf induced by…
Question 11: Explain eddy current with suitable example. How eddy currents can be minimized? ANSWER Eddy Currents Eddy currents are currents induced in metals moving…
Question 3: Describe Lenz’s Law. Show that this law is a manifestation of conservation of energy? ANSWER Lenz’s Law “The induced emf produced in a…
Question 4: Explain the phenomenon of mutual induction. Define the coefficient of mutual induction and units? ANSWER Mutual Induction The effect which results in an…
Question 5: Explain the phenomenon of self-induction. Define the coefficient of self-induction and units? ANSWER Definition of self-inductance “Self-inductance (or simply inductance) is the property…
Question 7: What is AC generator? Explain how alternating emf is generated by a loop of wire rotating in a magnetic field? ANSWER AC Generator…