Question

Why does the number of coils, the current and the ype of core affect the strength of the electromagnet

Answer 1

The number of coils, current and type of core affect the electromagnet as altering any of these factors differs the electricity current and voltage.

The more coils you have on an electromagnet, strengthens it. So for every coil of wire you add to an electromagnet, increases the "magnetic flux density"

Answer 2

Step-by-step explanation:

The magnetic field due to the current carrying coil is given by

`B = \mu _(0)nI`

Where, n be the number of turns, I be the current and
`\mu _(0)` is the absolute permeability.

Here, we observe that the strength of electromagnet is proportional to n, I and
`\mu _(0)`.

So, as the number of turns increases or the current increases, the strength of electromagnet increases.

If the core is filled with any other material then relative permeability is also added. So, the nature of core also affects the strength of electromagnet.