In rheostatic series control method of armature we add ____________(a) Variable resistor in parallel with armature(b) Variable resistor in series with armature(c) Fixed resistor in parallel with armature(d) Fixed resistor in series with armatureThe question was posed to me in homework.Enquiry is from Speed Control Using Armature Control in DC Motor topic in portion DC Motors of DC Machines

In rheostatic series control method of armature we add ____________(a)

1.	In rheostatic series control method of armature we add ____________(a) Variable resistor in parallel with armature(b) Variable resistor in series with armature(c) Fixed resistor in parallel with armature(d) Fixed resistor in series with armatureThe question was posed to me in homework.Enquiry is from Speed Control Using Armature Control in DC Motor topic in portion DC Motors of DC Machines
Answer» RIGHT choice is (b) Variable resistor in series with armature Easy EXPLANATION: In rheostatic series control method, we add variable resistance in series with the armature so that armature voltage can be varied, by varying the voltage drop at series resistor. By increasing VALUE of series resistor SPEED can be decreased.

Discussion

No Comment Found

Related InterviewSolutions

For which of the following motor dynamic braking is very effective?(a) Shunt motors(b) Separately excited motors(c) Series motors(d) Differential compound motorsThe question was asked by my college professor while I was bunking the class.Question is taken from Braking of DC Motors topic in portion DC Motors of DC Machines
When is the dynamic braking is employed?(a) Non-reversing drive(b) Reversing drive(c) Both Reversing and Non-reversing(d) Cannot tellI had been asked this question in an internship interview.My query is from Braking of DC Motors topic in division DC Motors of DC Machines
Which method of braking is generally used in elevators?(a) Plugging(b) Regenerative braking(c) Rheostatic braking(d) Mechanical brakingI had been asked this question during an internship interview.Question is taken from Braking of DC Motors in section DC Motors of DC Machines
Where dynamic braking is used?(a) Shunt motors(b) Series motors(c) Compound motors(d) All DC motorsI have been asked this question during an online interview.My enquiry is from Braking of DC Motors in portion DC Motors of DC Machines
Regenerative method of braking is based on ___________(a) Back emf is less than the applied voltage(b) Back emf is equal to the applied voltage(c) Back emf of rotor is more than the applied voltage(d) Cannot be determinedI have been asked this question during an interview.My question is taken from Braking of DC Motors topic in section DC Motors of DC Machines
During regenerative braking of DC motors ____________(a) Motor will run as a generator(b) Motor will reverse in direction(c) Motor will run at reduced speed(d) Motor will run as free rotating shaftI had been asked this question in a national level competition.My doubt stems from Braking of DC Motors in section DC Motors of DC Machines
The plugging braking gives the _____________(a) Zero torque braking(b) Smallest torque braking(c) Highest torque braking(d) Variable torque brakingI have been asked this question in an online quiz.Question is taken from Braking of DC Motors topic in division DC Motors of DC Machines
If the terminals of armature of DC motor are interchanged, this action will offer following kind of electrical braking ______________(a) Regenerative(b) Plugging(c) Dynamic braking(d) Depends on other parametersThe question was posed to me in my homework.This is a very interesting question from Braking of DC Motors topic in division DC Motors of DC Machines
Which of the following method is not used for regeneration?(a) Increasing field current(b) Increasing armature speed(c) Increasing supply voltage(d) Reducing supply voltageI have been asked this question in exam.My query is from Braking of DC Motors in chapter DC Motors of DC Machines
Regeneration is not easily possible for ____________(a) DC shunt motor(b) Separately excited motor(c) Compounding motor with weak series compounding(d) DC series motorThe question was asked in examination.My question is taken from Braking of DC Motors topic in division DC Motors of DC Machines

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment