Question

Which coil produces the strongest electromagnet for a given flow of current?

Answer 1

the coil which have more number of turn and more strong electric current it will act as a strong electromagnet where is the coil which have list number of turn and weak electric current it will act as a weak electromagnet

Explanation:

I hope it will help you please mark it as a brain list answer

Answer 2

Answer:

The ability of electromagnet depends on the strength of the magnetic field:Intensity of magnetic field due to a circular coil:

B=μ02nIr

Hence, the strength of the magnet depends on the value of n

.Case I:n1r1=10010=10

Case II:n2r2=2005=40

Case III:n3r3=20010=20

Case IV:n4r4=20020=10

Hence, the strongest electromagnet is possible in the case of a 5 cm coil with 200 turns.

Ans: Option − b