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OpenStudy (anonymous):
why does the magnetic field strength increases when we increase the coils around an iron piece in an electromagnet?
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OpenStudy (ghazi):
due to high permeability of iron it increases strength of magnetic field...
OpenStudy (ujjwal):
The strength of magnetic field of a solenoid is directly proportional to the number of turns in solenoid. And so, as we increase the coils. magnetic field strength increases.
OpenStudy (anonymous):
a coil is like a magnetic dipole. increasing number of coil is like increasing number of dipoles and hence increase in magnetic field.
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