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2 years ago

How is an electromagnet different from a magnet?

Physics

1 answer:

RSB [31]2 years ago

5 0

Answer: b . An electromagnet can be changed by changing the amount of current.

Explanation:

In an electromagnet, the magnetic field is generated by an electric current in a coil of wire which reinforces an iron core. But when the electric current applied on the mentioned core is disconnected, it immediately loses its magnetization. This also means that the intensity of the magnetic field can be controlled (increased or decreased) by changing the intensity of the electric current flowing through the nucleus.

On the other hand, the permanent magnet does not depend on electric current to magnetize, because due to its composition (a ferromagnetic material) the magnetization capacity continues even after not being in contact with an external magnetic field.

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A hockey puck slides on the ice and eventually stops. How would Newton interpret this behavior?

azamat

That would be a the first law of newton's laws of motion because it stops from an external force

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2 years ago

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Marat540 [252]

Answer:

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Explanation:

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2 years ago

Se define como la masa por unidad de volume

kogti [31]

Answer:

is it density

Explanation:

my bad if u get it wrong

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2 years ago

Si usted trata de contrabandear lingotes de oro llenando su mochila, cuyas dimensiones son de 56 cm * 28 cm * 22 cm, ¿cuál sería

kati45 [8]

Answer:

Mass, m = 665.77 kg

Explanation:

The question says that "If you try to smuggle gold bars by filling your backpack, whose dimensions are 56 cm * 28 cm * 22 cm, what would be its mass? "

The dimension of gold bar is 56 cm×28 cm×22 cm

We know that the density of gold is 19.3 g/cm³

The mas per unit volume of a material is called its density. It can be given by :

$d=\dfrac{m}{V}\\\\m=d\times V\\\\m=(19.3\ g/cm^3)\times (56\times 28\times 22\ cm^3)\\\\m=665772.8\ g\\\\m=665.77\ kg$

So, the mass of the gold bar is 665.77 kg.

5 0

2 years ago

Current is the movement of positive charges called electrons

GaryK [48]

Answer:what

Yeah

Explanation:

6 0

2 years ago

Read 2 more answers