Related Questions

The reciprocal of p/n is n/p and vice. Which of the following is the reciprocal of 3/2?
A 2/3
B 2/3
C 43/3
D 12/9
The adjective form of 'reluctance' is --------.
A reluct
B reluctive
C reluctant
D relucted
The unit of reluctance is
A $$\frac{{{\text{Meter}}}}{{{\text{Henry}}}}$$
B $$\frac{{{\text{Henry}}}}{{{\text{Meter}}}}$$
C $${\text{Henry}}$$
D $$\frac{1}{{{\text{Henry}}}}$$
Which of the following statements regarding reluctance-start motor is incorrect ?
A It is similar to reluctance motor
B It is basically an induction motor and not a synchronous one
C So far as its basic working principle is concerned, it is similar to shaded pole motor
D the air-gap between rotor and salient poles is non- uniform
For which of the applications a reluctance motor is preferred ?
A Electric shavers
B Refrigerators
C Signalling and timing devices
D Lifts and hoists
Which of the following statements regarding a reluctance motor is incorrect ?
A It cannot be reversed, ordinarily
B It requires no D.C. field excitation for its operation
C It is nothing else but a single-phase, salient pole synchronous-induction motor
D Its squirrel cage-rotor is of unsym-metrical magnetic construction in order to vary reluc-tance path between stator and rotor
In case of a reluctance motor, when the load is increased so that it cannot maintain synchronous speed the motor will
A Become unstable
B Draw excessive armature current and may burn out
C Fall out of synchronism and come to stand still
D Run as induction motor
A reluctance motor
A Is provided with slip rings
B Requires starting gear
C Has high cost
D Is compact
Reluctance motor is a
A Variable torque motor
B Low torque variable speed motor
C Self starting type synchronous motor
D Low noise, slow speed motor
The magnetic reluctance of a material
A decreases with increasing cross sectional area of material
B increases with increasing cross-sec-tional area of material
C does not vary with increasing cross-sectional area of material
D any of the above

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