Answer / amit

dc motor winding will be burn.

Answer / pandi

if A.c supply given to D.c motor more spark at brush & run
at low speed with noise

Answer / chandan

It depends on the motor construction. If the field winding
is connected in series with the armature winding, the motor
is like a universal motor and will probably operate
normally. If the field winding is connected in parallel with
the armature, the motor will not run, but will draw current,
make noise and get hot.

Answer / empobart jhambt baski

I want to know what is exactly the answer of this question?

Answer / arockia doss

Its quite simple...

Motor Will run with reduce speed & With Humming noise Comes
with Steps of jerk.

Answer / vinaykumar

it will run at very low speed and excessive heat is
produced in the motor due high hysterisis and eddy current
losses and along run may damage the motor

Answer / pradeep kumar rawat

When ac supply is ginen to DC motor, DC motor will run with
less speed and prodeced some noice.

Answer / mr.anant ram yadav

if A.c. supply given to D.c. motor the net torqe will be
zero and motor will not work. bez postive &negative cycle
is zero.

Answer / manish

dc motor does no work on ac.it will not rotate because in
india ac frequency is 50 hz so the time of half cycle is
only 10 ms.this time is too short to move because of its
inertia.


but expeptionaly dc series motor will rotate when it is
given to ac supply.

Answer / swarupa

In ac supply the magnitude and direction of voltage or
current changes for every half cycles so the dc motor may run
but in very low speed due to less torque develop & also due
to inertia.If it is run continue the frequency losses may
increase due to high heat.The efficiency poor.

In an ideal transformer no load primary current I0 A lags behind V1 by 90 degree B is in the phase with V1 C leads V1 by 90 degree D lags V1 by 45 degree

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I have carried out wiring for lighting in a shed in Industrial area which contains Metal halide lamps & have balanced in 3ph.Now when we put all the lines on in the daytime the current taken at 3phases at MCB comes to be equal i.e.28,29,28Amps respectively but in the night time i.e between 7p.m.to 11p.m. at the same MCb the current is 52,59,62Amp, though I have fit 63A MCB it is tripping in the above period.What may be the reason.? Note: This industry is located in industrial area where majority of steel ingot manufacturing plants are there. Whether this may be due to harmonic? what should I do to overcome above problem.pl suggest urgently.

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what is the difference between synchronization and paralleling?

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Will transformer heating be approximately the same for resistive, inductive or capacitive loads of the same VA rating? Explain.

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Hi, what is the temp of bus bar.

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why dc series motors never start without some load, and what will happen if starting with out load..

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