mani babu amballa

• Mar 5th, 2016

When the charging coil is disturbed suddenly, it will produce large amount of voltage

shubham

• Aug 31st, 2015

Choke work like transformer and its major components which is connected Across its inductor Stores current like caps

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What is the role of air gap in any electrical machine how does it affects induce emf??

A.Rajasekharreddy

• Sep 13th, 2016

Air gap is used to produce magnetic flux between stator and rotor. Air gap is more uniform for the production of sinusoidal EMF in alternators to eliminate the harmonics. Air gap is more in syn machin...

NITIN

• Aug 10th, 2016

Airgap is used to produce magnetic field between stator and rotor. Flux is produce in rotor winding, then torque develop and rotor is rotating, but if air gap is more between stator and rotor then more magnetizing current is required and also loss is more.

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Why ceiling fan rotates in anticlockwise direction?

P.Raghavan

• Jun 13th, 2017

When fan stops suddenly and starts running in clockwise what is it due to?

amardeep singh

• Jul 30th, 2011

Flux is produce in clockwise direction and eddy currents makes fan to rotate in anticlockwise direction..........

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What is the difference between phase and neutral?

sarita

• Nov 16th, 2014

Phase contain supply voltage i.e heavy electrons or protons and neutral contain no supply voltage and neutral charges.

saadsms

 Profile Answers by saadsms Questions by saadsms

• Oct 26th, 2014

1- in one phase case : Phase is supply voltage weather neutral is returning path the same current for that supply voltage. 2- in three phase case : - in balanced load current returned to earth = 0 - ...

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vishnu sharma

• Nov 27th, 2014

Catch the wire from both hands at a time in air, then potential difference is zero, so that current does not flow in body.

Santanu

• Jul 10th, 2013

There is no risk of any shock as the whole body is at same potential. However, if the persons body touches ground or for that matter, anything which may create a potential difference, there will be el...

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Can we measure reactive power by using only a single wattmeter? If Yes, How?

vki

• Sep 7th, 2017

We can measure by connecting potential coils of two wattmeters between two phases

Vamsi Krishna

• Feb 15th, 2017

Why single wattmeter is enough to measure 3 phase reactive power? Explain it elaborately.

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In a three phase system three wires are of colour red, yellow and blue are used to discriminate each phase. Now how will you identify each phase wire without knowing the colour and without any pre information?

Soumya Ranjan Nayak

• Dec 28th, 2017

Go for continuity test from source end & at testing end test in discharge condition.

WALT SLADE

• Nov 22nd, 2017

The neutral is often at the very top of a pole or it could be below the three hot phases. If all the wires are side by side, it sometimes uses a smaller insulator because theres very little voltage on...

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How we can change the direction of rotation of Induction motor?

vidya

• Nov 13th, 2017

What if all 3 phases are interchanged between 3 of them?

atul sudhakar

• May 2nd, 2014

By interchanging the two terminals keeping the third one fixed (fix R terminal and interchange Y and B)

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A.Rajasekharreddy

• Sep 13th, 2016

Brush less alternator is nothing but stationary armature, Brush alternator is a rotating armature.

Shan

• Aug 24th, 2016

Is there a exciting stator in brushed generator? If not what is the reason?

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What is the difference between earthing and grounding
When should I use any of both? Thanks

boe

• Aug 8th, 2013

Ground and earth is basically the same thing. Its all about providing the least path of resistance to the earth mass. Neutral is connecting the star point of three phase equipment out which serves as a return path for the flow of electricity.

jayashree priyadarsini

• Aug 4th, 2013

1.grounding means connecting the live parts of the equipment to the earth where as earthing means connecting the dead parts of the equipment to the earth. 2.grounding provides return path for the f...

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Does it absorb reactive power when ever it is needed ?

Scott Munnings

• Sep 17th, 2018

A machine is run overexcited when VARs are needed by the house load or the grid. Running overexcited up to the machines rating is not necessarily a bad thing. VARs needed to magnetize other machines...

Scott Munnings

• Sep 17th, 2018

Yes. It is measured for both metering (billing) and protective relaying purposes.

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Why do we rate transformer in KVA not in KW?

s harikumar

• Nov 16th, 2012

Transformer rating in KVA instead of KW since its iron loss depends on voltage and copper loss depends on load current only. It is not dependent on the power factor of the load.

pinaki patra

• Oct 10th, 2012

For a transformer power factor is dependent on load, which is variable. Hence fixed quantity VA is used in place of watts.

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Why capacitors are used in 1 phase induction motors?

SONY RANJAN MAHAPATRA

• Jun 25th, 2013

Basically function of capacitor is to improve the power factor and make the single phase motor self start having made split phase between both the winding(starting & running winding)

shaik sharif

• Jun 5th, 2013

In generally capacitors are playing main role in electrical system.And also power factor improvement done by capacitors so therefore capacitors mainly using for increase the starting torque of the motor.

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What is the purpose of Q-point in transistor?

MADHUSHREE SINHA

• Nov 9th, 2015

It is a DC operating point between saturation and cutoff. It must be selected in a way that it does not go into saturation or cutoff.

bala

• Oct 24th, 2015

It is more important for a transistor because according to this value, it may operate as an amplifier or a switch and most importantly the point should not vary with temperature hence we normally prefer voltage divider bias.

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Why transformer does not rotate like induction motor. Inspite both having same principle?

dhananjai

• Feb 3rd, 2012

Actually in 3 phase induction motor the windings are displaced with angle of 120 degree in space that is why a rotating magnetic field is produced while in transformer the windings are concentric rather than displaced

Avishek Pal

• Jan 21st, 2012

Transformer winding is made of concentric winding but the stator winding of induction motor is made of distributed winding over inner periphery. Hence flux in transformer is pulsating in nature and st...

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Yogesh Dandile

• Aug 4th, 2017

Induce high voltage

mUzammil

• Oct 7th, 2016

Tube light needed 1000v for ionization process for starting so choke provided its.

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1. what is the different between CGS system and MKS system? 2. When we connect the capacitor Banks in Series with the circuit 3. What is the difference between Earthing & grounding 4. how much voltage is present in neutral resistance?and how much voltage is present in earth resistance... 5. What is the purpose of calculating knee point voltage for Current transformers? 6. What is the voltage drop for...

siva.naga.raju.bits

 Profile Answers by siva.naga.raju.bits Questions by siva.naga.raju.bits

• Jun 21st, 2011

100 MVA transformer is cooled by air blast cooling mechanism

SURAJTHEGREAT

 Profile Answers by SURAJTHEGREAT Questions by SURAJTHEGREAT

• Apr 10th, 2011

When capacitor is connected in series with the supply source (dc battery) ,capacitor gets fully charged and as a no current flows to the load!!!! When capacitor is connected in series with the supply source (ac) ,a leading current flows through the load.

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Editorial / Best Answer

Answered by: joe

• Dec 23rd, 2006

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100 kw is the full load rating of the generator..... ..that means it can supply 100 kw without exceeding in specified temperature limits .that doesnt mean that it wont be able to supply a load more than 100 kw,it can but not for a longer period of time.after sometime the generator will burn out.if a load of 50 kw is connected to generator the generator will generate only 50 kw& not more than that.the generator will generate power only according to the requirement.

Dharmender

• Feb 7th, 2018

Connected Load is 96kw &125kvaDG set will have run stand by unit for Hotel is suitable plz give your technical supporting answer

Mayilsamy Kasipandi

• Jul 11th, 2017

The Generator produce the power is exactly what we withdraw as load. 100 kw genset can produce 1 kw to 115kw power depending upon the connected/withdrawing load. Normally the generator can produce 115% of designed rating.

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Gaurav

• Jan 13th, 2017

Capacitor causes a lag in the phase, resulting in a good starting torque.

manoj yadav

• Sep 1st, 2016

Capacitors provide phase difference between voltage and current and give starting torque

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M.SANTHOSH KUMAR

• Aug 7th, 2015

Why we do not give DC supply in transformer means DC current is a direct current, so alternating flux is not produced, because input supply and flux will be same, so emf will not produced and same tim...

avdhesh sharma

• Aug 2nd, 2015

Current=voltage/impedance, When DC is applied then Z=R =>I= V/R and R is low for transformer, so I increases very high, so heating as current is not allowed to flow further and hence intuitively you c...

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