Magnetic Circuit Silicon steel is used in electrical machines because it has Low hysteresis loss High coercivity Low retentivity Low coercivity Low hysteresis loss High coercivity Low retentivity Low coercivity 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 500 20 50 70 500 20 50 70 ANSWER DOWNLOAD EXAMIANS APP
Magnetic Circuit Energy stored by a coil is doubled when its current is increased by percent. 47.5 41.4 44.6 42.5 47.5 41.4 44.6 42.5 ANSWER DOWNLOAD EXAMIANS APP
Magnetic Circuit The relative permeability of a ferromagnetic material is More than one More than 100 Ωr 1000 More than 10 Less than one More than one More than 100 Ωr 1000 More than 10 Less than one ANSWER DOWNLOAD EXAMIANS APP
Magnetic Circuit 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 Its mechanical strength is low It has good residual magnetism Its mechanical strength is high Its hysteresis loop has large area ANSWER DOWNLOAD EXAMIANS APP
Magnetic Circuit The rate of rise of current through an inductive coil is maximum At the start of the current flow Near the final maximum value of current At 63.2% of its maximum steady value After one time constant At the start of the current flow Near the final maximum value of current At 63.2% of its maximum steady value After one time constant ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS