Expert Electromagnetism Example Problems and Physics Help

High School
Physics
Electromagnetism

I have to calculate the pressure on a current carrying wire. Since there is a pressure on the wire, there must be a force on it, which is a magnetic force. Does the magnetic field produced by the wire, exert a magnetic force on the wire itself? If this is true, why?

flatantsmu 2022-10-01

"The only power consumed in a DC electromagnet is due to the resistance of the windings, and is dissipated as heat."
Is this true? So powerful magnets like junkyard magnets don't consume electricity apart from resistance?
How much does electricity does a junkyard or any other powerful super magnet consume?

dekkyrkex4 2022-10-01

Can a permanent magnet be coiled to also double as a electromagnet? Could the current reverse or double the poles? The wire coil is made from a long thin magnetic bar.

ecoanuncios7x 2022-09-30

Magnetic field doesnt do any work, so when an electromagnet lifts, say a car or something, where is the energy coming from?

redolrn 2022-09-29

Why are electromagnets made of soft iron?

Tatiana Cook 2022-09-29

When the ends of two bar magnets are near each other, they are found to attract. The ends must be (a) one north, the other south, (b) both north, (c) both south, (d) either (a) or (b).

Plaginicj 2022-09-29

What two characteristics are balanced in hydrostatic equilibrium?
a. gravity and magnetism
b. mass and energy
c. weight and pressure
d. positive and negative charges

Mosia Lejoni2022-09-27

spatularificw2 2022-09-27

Is there anyway to transfer the electromagnetic energy of a naturally occurring magnet into usable electricity kinda like using the magnet as a battery?

zapri4j 2022-09-27

Hard magnets are materials, in which the process of
a. magnetization is done easily, but demagnetization is difficult
b. demagnetization is done easily, but magnetization is difficult
c. magnetization and demagnetization is done easily
d. magnetization and demagnetization is difficult

gemauert79 2022-09-27

Describe the different types of magnetism that materials can display and account for their origins.

Valentina Holland 2022-09-26

A bar magnet with its S pole on top moves upward toward the origin, $⟨ 0, 0, 0 ⟩$ . Looking down at the origin from above (alang the 'y axis), is the pattern of curly electric field clockwise or counterclockwise?

traffig75 2022-09-26

What happens if you suspend a bar magnet so that it can swing freely?

batejavizb 2022-09-26

What is the difference between electromagnet and solenoid? Both these terms seem as the same thing to me. The only difference that I can find seems to be that an electromagnet contains a soft iron core.

Ilnaus5 2022-09-26

Let's assume that there is an electromagnet with $B = 1 T$ , what is the magnitude of the force it could generate on other dipoles equal to it's surface area? Can the magnitude of force (in newtons) be determined from $B$ ?

Joyce Sharp 2022-09-25

Imagine if you have a magnetic material and you fix it into a position between two electomagnets, or perhaps in the center of a sphere of electomagnets. Is it possible that you could apply enough force to crush the magnetic material such that it becomes a black hole?

saucletbh 2022-09-25

Is the amount of energy used to power an electromagnet directly proportional to the amount of work an electromagnet does?
That is, if I were to power an electromagnet with hypothetical battery that does not drain, will that electromagnet always output the same level of magnetism, regardless of external influence such as magnetic objects attracted by the electromagnet? Does magnetism have a "cost" that diminishes the magnetic field in some way?

batejavizb 2022-09-25

How do I calculate the pull force of a cylindrical electromagnet to Iron as a function of distance? Is there any difference betweeen magnets and electromagnets?

Julia Chang 2022-09-25

If we make an electromagnet by winding 3000 turns on 5-inch-long cast iron bar, and provide 12V and 2A of current, it will produce the magnetic field with certain magnitude.
The question is: If we increase the weight of the objects being lifted by that electromagnet, will it consume more current? If we lift much smaller weight by that electromagnet, will it use lesser current?

Mainuillato2p 2022-09-25

Control Static electricity like electromagnet
Can we use a battery to generate static energy on a plate? If the power is on it should attract dust or small objects. If power is off just drop them. Just like I can with an electromagnet. Is friction necessary for static energy?

Electromagnetism Physics belongs to those aspects of the science that can be applied to anything from engineering to design and construction of automation for our daily life. Since we are dealing with the relations between electricity and magnetism, finding answers and questions that we present will help you to see practical examples like radio, gamma rays, or microwave emissions. Take at least one electromagnetism example and you will be able to repeat the steps or receive relevant help. Make sure to focus on the experiments and the order of the steps to gain even more clarity as you study electromagnetism.

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