Questions on Magnetic Induction

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Insulated copper wire is essential for electromagnet coils to prevent short circuits and ensure efficient current flow. An iron core significantly enhances the strength of an electromagnet compared to a wooden core due to its magnetic properties. The strength of an electromagnet increases with higher current magnitude and more turns of wire around the core. The equation B = UoNI / 2a describes the magnetic field strength, where B is the magnetic flux density, Uo is the permeability of free space, N is the number of turns, and I is the current. The discussion highlights challenges in deriving the equation, indicating a need for clearer understanding of the underlying principles.
metz143
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1.Why must you use insulated copper wire for the coils of an electromagnet?
2. How does the strength of a wooden core electromagnet compare with that of the iron electromagnet?
3. How does the magnitude of the current affect the strength of the electromagnet?
4. How does the number of turns affect the strength?
5. How was this equation derive?
B= UoNI /2a


Thanks in advance. :confused: :smile:
 
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did you try to answer it? what is your answer?
 
Yes, i tried to answer question 5..but got it wrong..i keep solving it but still i didn't get it right.
 
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