A Solenoid is a wire wrapped around a metallic core which creates a magnetic field on transfer of current to it. Solenoids can create controlled magnetic fields and can be used as electromagnets.
The magnetic field inside a solenoid is given by:
B=unI=uNI/h
where u=(4*22/7)*10 to power -7 henries per meter.
B is the magnetic field magnitude in teslas, n is the number of turns per meter, I is the current in amperes, N is number of turns, h is the length of the solenoid in meters
Such coils, called solenoids, have an enormous number of practical applications. The field can be greatly strengthened by the addition of an iron core
How many loops are necessary to create a solenoid with a uniform magnetic field? Build a solenoid by adding current loops to the simulation
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