Question

Prepare three electromagnet with 10, 20 and 30 turns. Connect them one by one to a battery of three cells. Take the electromagnet near a box of pins. Count the number of pins attracted by it. Compare the strength of these electromagnet on the basis of your observation. Given reason for it.

Answer 1

when electricity runs through copper wire it creates a magnetic field therefore the pins get attracted to electromagnet

Answer 2

the electromagnet with 30 turns will attract most pins because it is a property of an electromagnet that it gets stronger when your increase the no. of coils on itelectromagnet with 10 turns will be strong, with 20 turns will be stronger and 30  will be strongest
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