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3 years ago

Why is soft iron used for the core of an electromagnet?

Physics

2 answers:

aliina [53]3 years ago

5 0

Answer:

Because of the high permeability and high saturation level of holding magnetism.

Explanation:

Soft iron always used in the core of an electromagnet because of the following reason which are discussed below.

Permeability: These magnets are highly permeable means they can gain magnetism when current is passes through them and instantly loose magnetism after removal of current.
High saturation level: The property of these soft magnets are they have the high value of saturation means they can hold high level of magnetism without easily saturating.

Tanzania [10]3 years ago

3 0

The soft iron inside the coil makes the magnetic field stronger because it becomes a magnet itself when the current is flowing. Soft iron is used because it loses its magne

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Mathematical expression for the Newton's second law of motion is given as:

$F=\frac{dp}{dt}$ ............................................(1)

where:

dp = change in momentum

dt = time taken to change the momentum

We know, momentum:

$p=m.v$

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∵mass is constant at speeds v << c (speed of light)

$\therefore F=m.\frac{dv}{dt}$

and, $\frac{dv}{dt} =a$

where: a = acceleration

$\Rightarrow F=m.a$

also

$F\propto \frac{1}{dt}$

so, more the time, lesser the force.

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$I=F.dt$

$I=m.a.dt$

$I=m.\frac{dv}{dt}.dt$

$I=m.dv=dp$

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