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vredina [299]
4 years ago
5

How bullet train and circuit breaker work on the magnetic effect of current?

Physics
1 answer:
777dan777 [17]4 years ago
3 0
<em><u>bullet trains:
</u>bullet trains are also called <u>Maglev trains..</u>as they work with the help of powerful electromagnets which make them high speed trains ,, electromagnets are attached to 
metal lining of track 
large magnets are present inside the train 
they work on the principal that like poles repel and unlike poles attract..
<u>circuit breakers:
</u>it is a device which cuts the power when when there is too much current flowing through the circuits,, they are also called fuses,, they work with the help of electromagnet ,, to cut the circuit and rejoin... </em>
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A very long cylinder, of radius a, carries a uniform polarization P perpendicular to its axis. Find the electric field inside th
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Answer:

For electric field inside cylinder, check image 02 attached

For electric field outside cylinder, check image 03 attached

Explanation:

Let's consider the polarized cylinder as superposition of two cylinders with opposite,equal, uniform charge densities in a way shown in the figure in the "image 01"d attached ;

In general, if we have an object with polarization (P¬) , then we have to take two objects with similar shape to the system, with opposite, equal, and uniform charge densities and then we super-impose these two objects in such a way that the total dipole moment of this superimposed system is equal to the total dipole moment of original system.

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For the electric field inside the cylinder, check the solution in "image 02" i attached

For the electric field outside the cylinder, check, "image 03" i attached.

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