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Functions of the commutator:
A commutator is a device, which under certain conditions changes ac into dc and vice versa.
The commutator is a form of rotating switch placed between the armature and external circuit and so arranged that it reverses the links to the external circuits at the instant of every reversal of the current in the armature coil. Thus it changes induced alternating currents in armature coils into direct currents in the external load circuits.
what is the physics principle involved in the lens maker equation
Real and Simple or Distinct Poles If all the poles of F1(s) are of first order, Equation may be written in terms of a partial fraction expansion as where p 1 , p 2 ,...
What is time? 1. This is the question that each true scientist dreads to be asked especially in a public setting by extremely inquisitive young learners. We have learned to ca
For each element the number of neutrons in the nucleus can vary. Isotopes :Nuclei of given element with different numbers of neutrons.If they are not radioactive they called
Explain Weightlessness When can you feel weightless? There are two basic ways. You can be far enough away from all large objects in the universe that the force of gravity due t
describe the phenomenon of nicol prism activity
What are different pumping mechanisms in LASERS?
Draw the graph showing the variation of binding energy per nucleon with mass number. Give the reason for the decline of binding energy per nucleon for nuclei with high mass numbers
How long does it take for the water to reach the boiling point? An iron boiler of mass 230 kg contains 830 kg of water at 18C. A heater supplies energy at the rate of 52,000 kj/
Using a pulley Use the pulley set-up shown in experiment A 12. Apply the force on the movable pulley and get how rapidly the weight on the other end of the string rises.
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