Permeability in a magnetic circuit corresponds to_________ in an electric circuit. Conductance Resistivity Resistance Conductivity TRUE ANSWER : ? YOUR ANSWER : ?
The relative permeability of a ferromagnetic material is More than 10 More than one Less than one More than 100 Ωr 1000 TRUE ANSWER : ? YOUR ANSWER : ?
While comparing magnetic and electric circuits, the flux of magnetic circuit is compared with which parameter of electrical circuit? Current E.M.F Conductivity Current density TRUE ANSWER : ? YOUR ANSWER : ?
The property of a material which opposes the creation of magnetic flux in it is known as Reluctivity Permeance Magneto-motive force Reluctance TRUE ANSWER : ? YOUR ANSWER : ?
Reciprocal of reluctance is Susceptibility Permeance Permeability Reluctivity TRUE ANSWER : ? YOUR ANSWER : ?
An air gap is usually inserted in magnetic circuits to Increase m.m.f. Prevent saturation None of the listed here Increase the flux 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 50 70 TRUE ANSWER : ? YOUR ANSWER : ?
Laminated cores, in electrical machines, are used to reduce Hysteresis loss Copper loss Eddy current loss All of the listed here TRUE ANSWER : ? YOUR ANSWER : ?
Those materials are well suited for making permanent magnets which have ________ retentivity and ________ coercivity. Low, low Low, high High, high High, low TRUE ANSWER : ? YOUR ANSWER : ?
Ferrites have high hysteresis Ferrites have high resistance Ferrites have high resistance None of the listed here Ferrites have low permeability TRUE ANSWER : ? YOUR ANSWER : ?