MCQs 1: Those magnetic materials are best suited for making armature and transformer cores which have ________ permeability and ________ hystersis loss
MCQs 2: A material for good magnetic memory should have____________?
MCQs 3: If the area of hysteresis loop of a material is large, the hysteresis loss in this material will be____________?
MCQs 4: 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
MCQs 5: 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
after one time constant
near the final maximum value of current
MCQs 6: Permanent magnets are normally made of_____________?
MCQs 7: The unit of magnetic flux is______________?
MCQs 8: Point out the wrong statement. Magnetic leakage is undesirable in electric machines because it___________?
lowers their power efficiency
increases their cost of manufacture
leads to their increased weight
produces fringing
MCQs 9: An air gap is usually inserted in magnetic circuits to____________?
MCQs 10: In a magnetic material hysteresis loss takes place primarily due to___________?
ABOUT US
Category
Who We Are