Necessity of a starter, Physics

Assignment Help:

Necessity Of A Starter

For D.C Motors When motor is at rest, then N=0 and due to Eb  is directly proportional to N, so 

 At begin E =  zero

Thus armature current at the time of starting

 Ias  =  (V-0)/ Ra   =  V/ Ra

i.e. at begin armature, current can be measured by simply applying ohm's law, As the resistance of the armature winding is very small then the motor will take large amount of present at the time of starting i.e. if supply voltage is 220 V and armature resistance is 0.5 ?, then initializing current will be equal to 220/0.5  = 440A

 


Related Discussions:- Necessity of a starter

Determine the frequency heard by the engineer on train, Two trains on separ...

Two trains on separate tracks move toward one another. Train 1has a speed of 140 km/h, train 2 speed of 55.0 km/h. Train 2 blows it shorn, emitting a frequency of 500 Hz. What is t

Physics, What is Fresnel explanation of optical activity

What is Fresnel explanation of optical activity

Continuous emission spectrum, (i) It has of continuously varying wavelength...

(i) It has of continuously varying wavelengths in a exact wavelength range. (ii) It is given by solids, liquids and highly compressed gases heated to high temperature. (iii)

What is the unit of capacitance in si system of measure, In the SI system o...

In the SI system of measure, what is the unit of capacitance? Ans: In the SI system of measure, farad is the unit of capacitance.

Express the new single black hole, 1. How fast must an object travel for i...

1. How fast must an object travel for its total energy to be (a) 1% more than its rest energy and (b) 99% more than its rest energy. 2. A proton is moving with a constant speed

Long solenoid is fabricated, A long solenoid is fabricated by closely windi...

A long solenoid is fabricated by closely winding a wire of radius 0.5 mm over a cylindrical nonmagnetic frame so that the successive turns nearly touch every other. What would be t

Pv diagram, is always del U o in cyclic process

is always del U o in cyclic process

Calculate the absolute pressure within the chamber in bars, (i) A closed sy...

(i) A closed system consisting of 2 kg of a gas undergoes a process during which the relationship between pressure and specific volume is pv1.3 = c. The process begins with 1 p =1b

Write the relation among mobility and drift velocity, Write the mathematica...

Write the mathematical relation among mobility and drift velocity of charge carriers in a conductor. Name the mobile charge carriers responsible for conduction of electric curre

Define gas in harmonic well, Define Gas in Harmonic Well? A classical ...

Define Gas in Harmonic Well? A classical system of N distinguishable no interacting particles of mass m is placed in a three-dimensional harmonic well: a) Discover t

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd