Permeability in a magnetic circuit corresponds to_________ in an electric circuit. Resistance Conductance Conductivity Resistivity TRUE ANSWER : ? YOUR ANSWER : ?
Point out the wrong statement. Magnetic leakage is undesirable in electric machines because it Leads to their increased weight Lowers their power efficiency Produces fringing Increases their cost of manufacture TRUE ANSWER : ? YOUR ANSWER : ?
Hard steel is suitable for making permanent magnets because Its mechanical strength is low It has good residual magnetism Its mechanical strength is high Its hysteresis loop has large area TRUE ANSWER : ? YOUR ANSWER : ?
Those materials are well suited for making permanent magnets which have ________ retentivity and ________ coercivity. High, high Low, low High, low Low, high TRUE ANSWER : ? YOUR ANSWER : ?
Silicon steel is used in electrical machines because it has High coercivity Low coercivity Low retentivity Low hysteresis loss TRUE ANSWER : ? YOUR ANSWER : ?
Reciprocal of reluctance is Susceptibility Permeability Permeance Reluctivity 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 : ?
The property of a material which opposes the creation of magnetic flux in it is known as Magneto-motive force Permeance Reluctance Reluctivity TRUE ANSWER : ? YOUR ANSWER : ?
The relative permeability of a ferromagnetic material is Less than one More than 10 More than one More than 100 Ωr 1000 TRUE ANSWER : ? YOUR ANSWER : ?