While comparing magnetic and electric circuits, the flux of magnetic circuit is compared with which parameter of electrical circuit? Conductivity E.M.F Current density Current TRUE ANSWER : ? YOUR ANSWER : ?
Ferrites have high hysteresis Ferrites have high resistance None of the listed here Ferrites have high resistance Ferrites have low permeability TRUE ANSWER : ? YOUR ANSWER : ?
Permeability in a magnetic circuit corresponds to_________ in an electric circuit. Conductivity Conductance Resistivity Resistance TRUE ANSWER : ? YOUR ANSWER : ?
The rate of rise of current through an inductive coil is maximum At the start of the current flow At 63.2% of its maximum steady value After one time constant Near the final maximum value of current TRUE ANSWER : ? YOUR ANSWER : ?
Conductivity is analogous to Inductance Resistivity Retentivity Permeability TRUE ANSWER : ? YOUR ANSWER : ?
Those magnetic materials are best suited for making armature and transformer cores which have ________permeability and _________hysteresis loss. High, high Low, high High, low Low, low TRUE ANSWER : ? YOUR ANSWER : ?
Laminated cores, in electrical machines, are used to reduce Copper loss Hysteresis loss Eddy current loss All of the listed here TRUE ANSWER : ? YOUR ANSWER : ?
The property of a material which opposes the creation of magnetic flux in it is known as Reluctance Permeance Reluctivity Magneto-motive force TRUE ANSWER : ? YOUR ANSWER : ?
The initial rate of rise of current through a coil of inductance 10 H when suddenly connected to a D.C. supply of 200 V is ___________Vs 500 20 70 50 TRUE ANSWER : ? YOUR ANSWER : ?