7. Why AC motors, AC bulbs etc... are donot operated by DC signals? and

7. Why AC motors, AC bulbs etc... are donot operated by
DC signals? and
Why DC motors, DC bulbs etc... are donot operated by
AC signals?

Question Posted / n.dhanasekaran

2 Answers
4670 Views
Bhel, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

7. Why AC motors, AC bulbs etc... are donot operated by DC signals? and Why DC motors, DC bu..

Answer / subrata

1.due to frequency

Is This Answer Correct ?

19 Yes

5 No

7. Why AC motors, AC bulbs etc... are donot operated by DC signals? and Why DC motors, DC bu..

Answer / shashidhara tm

AC machines require magnetic flux change at designed frequency... In case of India, 50Hz. For example, if no changing flux is given to an induction motor, it won't produce a rotating magnetic flux resultant on the rotor and it won't rotate the rotor. If no alternating voltage is given to a fluorescent lamp, it won't produce high voltage breakdown in the inert gas and emit UV.
But I'm not sure whether a DC motor works or not on AC voltage...

Is This Answer Correct ?

2 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

sir i applied for hpcl(electrical).i want to know from which subjects most of the technical que will b asked.and pattern of the written test.pls help me

0 Answers HPCL,

what will happen at the time of CT saturation?and what will be the Relay's function at the time of CT saturation?

2 Answers

A double circuit with dog conductor 66KV Transmission line from wind farm evacuation to feeding substation having capacity of 25MW for transmission. Can same transmission network be considered for further expansion of Power & how much in MW. If we need to expand next 10-15 MW more will there any augmentation is required in transmission network? Kindly reply asap.

0 Answers

In an panel board if the outgoings are power plugs and motor equipments...what should we choose as the incomer of the of the panel board?? MCCB OR ISOLATOR?? Should we use ELCB protection??if so where??

2 Answers

how pt is using

0 Answers

What happens to the synchronous generator when reverse power is given to it?

1 Answers

placing earthing pit in pathway is correct or wrong??. placing earthing wireGI1/18 inside walls is correct or wrong?. explain!!!

0 Answers

Atwhat condition reverse power relay will act?

0 Answers Equate,

What is cathode ray oscilloscope (cro)?

0 Answers

What is the maximum size(MVA)of power transformer available in the India/world?