Magnetic Circuit When both the inductance and resistance of a coil are doubled the value of 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 Initial rate of rise of current is doubled Time constant is halved Final steady current is doubled ANSWER DOWNLOAD EXAMIANS APP
Magnetic Circuit The property of a material which opposes the creation of magnetic flux in it is known as Reluctance Permeance Reluctivity Magneto-motive force Reluctance Permeance Reluctivity Magneto-motive force 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 Silicon steel is used in electrical machines because it has Low retentivity Low coercivity Low hysteresis loss High coercivity Low retentivity Low coercivity Low hysteresis loss High coercivity ANSWER DOWNLOAD EXAMIANS APP
Magnetic Circuit Hysteresis loss least depends on Ambient temperature Volume of material Frequency Steinmetz’s coefficient of material Ambient temperature Volume of material Frequency Steinmetz’s coefficient of material ANSWER DOWNLOAD EXAMIANS APP
Magnetic Circuit The rate of rise of current through an inductive coil is maximum At 63.2% of its maximum steady value At the start of the current flow Near the final maximum value of current After one time constant At 63.2% of its maximum steady value At the start of the current flow Near the final maximum value of current After one time constant ANSWER DOWNLOAD EXAMIANS APP
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