Question

Which of the following electromagnet will have the strongest force?
Answers:
A battery with no loops of wire around the nail.

A battery with 10 loops of wire around the nail.

A battery with 3 loops of wire around the nail.

A battery with 15 loops of wire around the nail.

Answer 1

Answer:

A battery with no loops of wire around the nail

Answer 2

Electromagnet which have the strongest force are: A battery with 15 loops of wire around the nail

Explanation:

Here, we have find the that in the options which electromagnet have the strongest force

A battery with 15 loops of wire around the nail has the strongest electromagnetic force because

Force of an Electromagnet is given by:

$F=(n\times i)^{2}\times magnetic constant\times \frac{a}{2\times g^{2} }$

where n=number of loops around the solenoid.

as F is directly proportional to the number of turns in the solenoid.

f ∝n

so, f ∝$n^{2}$

so the battery with the 15 loops of wire around the nail has the strongest electromagnetic force