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Physics/ac bulbs work in dc

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Question
Sir ac bulbs lights work in both ac current and dc current whereas ac motor cant work , I mean ac motor work in only ac current not in dc current what is reason behind this ....

Answer
A light bulb just requires its filament to be heated...DC vs. AC is not important for that so much.  However, AC motors require timing in the current flow, there's not way for the rotor and stators to act in concert with just DC current if the motor itself isn't wired to flip the current.

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Dr. Stephen O. Nelson

Expertise

I can answer most basic physics questions, physics questions about science fiction and everyday observations of physics, etc. I'm also usually good for science fair advice (I'm the regional science fair director). I do not answer homework problems. I will occasionally point out where a homework solution went wrong, though. I'm usually good at explaining odd observations that seem counterintuitive, energy science, nuclear physics, nuclear astrophysics, and alternative theories of physics are my specialties.

Experience

I was a physics professor at the University of Texas of the Permian Basin, research in nuclear technology and nuclear astrophysics. My travelling science show saw over 20,000 students of all ages. I taught physics, nuclear chemistry, radiation safety, vacuum technology, and answer tons of questions as I tour schools encouraging students to consider careers in science. I moved on to a non-academic job with more research just recently.

Education/Credentials
Ph. D. from Duke University in physics, research in nuclear astrophysics reactions, gamma-ray astronomy technology, and advanced nuclear reactors.

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