Magnetic Circuit Silicon steel is used in electrical machines because it has Low retentivity High coercivity Low hysteresis loss Low coercivity Low retentivity High coercivity Low hysteresis loss Low coercivity ANSWER DOWNLOAD EXAMIANS APP
Magnetic Circuit When both the inductance and resistance of a coil are doubled the value of Time constant is halved Time constant remains unchanged Final steady current is doubled Initial rate of rise of current is doubled Time constant is halved Time constant remains unchanged Final steady current is doubled Initial rate of rise of current is doubled ANSWER DOWNLOAD EXAMIANS APP
Magnetic Circuit The rate of rise of current through an inductive coil is maximum After one time constant Near the final maximum value of current At 63.2% of its maximum steady value At the start of the current flow After one time constant Near the final maximum value of current At 63.2% of its maximum steady value At the start of the current flow ANSWER DOWNLOAD EXAMIANS APP
Magnetic Circuit If the area of hysteresis loop of a material is large, the hysteresis loss in this material will be Small None of the listed here Large Zero Small None of the listed here Large Zero ANSWER DOWNLOAD EXAMIANS APP
Magnetic Circuit The unit of reluctance is Meter/Henry Henry/meter Henry 1/Henry Meter/Henry Henry/meter Henry 1/Henry ANSWER DOWNLOAD EXAMIANS APP
Magnetic Circuit Hard steel is suitable for making permanent magnets because Its mechanical strength is low Its hysteresis loop has large area It has good residual magnetism Its mechanical strength is high Its mechanical strength is low Its hysteresis loop has large area It has good residual magnetism Its mechanical strength is high ANSWER DOWNLOAD EXAMIANS APP
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