Galvanometer, its conversion to an ammeter and voltmeter … msa

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…

a-c-motor-its-construction-and-working

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…

transformer-its-principle-and-mathematical-relations

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…

back-emf-in-an-electric-motor

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…

motional-emf

Question 6: What is motional emf? Show that motional induced emf = Blv. ANSWER Definition of Motional emf “Motional emf is the emf induced by…

eddy-current-its-minimization

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…

lenz-law

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…

mutual-induction-its-coefficient

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…

self-inductance-and-its-coefficient

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…

ac-generator

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…