Magnetic Circuit Mcqs
Magnetic Circuit Mcqs, this topic has 28 mcqs, It takes five to ten minutes to complete this free Magnetic Circuit Mcqs test. You will see 4 or 5 option of each question. You must choose / think only one option and then press on answer key for check right answer. Practice "Magnetic Circuit Mcqs" MCQs and share with your friends, brothers, sisters.
Magnetic Circuit Mcqs (Total Quiz: 28)
MCQ: Those magnetic materials are best suited for making armature and transformer cores which have ________ permeability and ________ hystersis loss
- high, high
- low, high
- high, low
- low, low
C
MCQ: A material for good magnetic memory should have____________?
- low hysteresis loss
- high permeability
- low retentivity
- high retentivity
D
MCQ: If the area of hysteresis loop of a material is large, the hysteresis loss in this material will be____________?
- zero
- small
- large
- none of the above
C
MCQ: 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
- 50
- 20
- 0.05
- 500
B
MCQ: 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
B
MCQ: Permanent magnets are normally made of_____________?
- alnico alloys
- aluminium
- cast iron
- wrought iron
A
MCQ: 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
A
MCQ: An air gap is usually inserted in magnetic circuits to____________?
- increase m.m.f.
- increase the flux
- prevent saturation
- none of the above
C
MCQ: In a magnetic material hysteresis loss takes place primarily due to___________?
- rapid reversals of its magnetisation
- flux density lagging behind magnetising force
- molecular friction
- it high retentivity
D