Magnetic Circuit Silicon steel is used in electrical machines because it has Low coercivity Low retentivity Low hysteresis loss High coercivity Low coercivity Low retentivity Low hysteresis loss High coercivity ANSWER DOWNLOAD EXAMIANS APP
Magnetic Circuit The relative permeability of a ferromagnetic material is Less than one More than 10 More than 100 Ωr 1000 More than one Less than one More than 10 More than 100 Ωr 1000 More than one ANSWER DOWNLOAD EXAMIANS APP
Magnetic Circuit Hysteresis loss least depends on Frequency Steinmetz’s coefficient of material Volume of material Ambient temperature Frequency Steinmetz’s coefficient of material Volume of material Ambient temperature ANSWER DOWNLOAD EXAMIANS APP
Magnetic Circuit When both the inductance and resistance of a coil are doubled the value of Initial rate of rise of current is doubled Time constant is halved Final steady current is doubled Time constant remains unchanged Initial rate of rise of current is doubled Time constant is halved Final steady current is doubled Time constant remains unchanged ANSWER DOWNLOAD EXAMIANS APP
Magnetic Circuit A material for good magnetic memory should have Low hysteresis loss High permeability High retentivity Low retentivity Low hysteresis loss High permeability High retentivity Low retentivity ANSWER DOWNLOAD EXAMIANS APP
Magnetic Circuit 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 20 50 500 70 20 50 500 70 ANSWER DOWNLOAD EXAMIANS APP
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