Makenna Booker
2022-07-15
Answered

If electromagnetic fields and waves are the same, then doesn't that mean that you can induce current from waves? Therefore transferring electricity over long distances?

You can still ask an expert for help

polishxcore5z

Answered 2022-07-16
Author has **14** answers

"If electromagnetic fields and waves are the same,"

They are not always the same

"doesn't that mean that you can induce current from waves? Therefore transferring electricity over long distances?"

You can send waves over long distances, see how works the antennas, the lasers, the communication through satellites (don't forget that light is also e.m. field).

They are not always the same

"doesn't that mean that you can induce current from waves? Therefore transferring electricity over long distances?"

You can send waves over long distances, see how works the antennas, the lasers, the communication through satellites (don't forget that light is also e.m. field).

asked 2022-11-12

If you put an electromagnet in front of a copper coil it will induce a magnetic field into the copper coil but will it do the same to lead.

asked 2022-10-16

When a electromagnet is activated, the field must take time to form at both ends and stabilize. What is this time? Or, to put it differently, what is the speed at which the magnetic field forms?

asked 2022-07-16

Hypothetically, if I were to move at the speed of light, would I see an oscillating electromagnetic wave or photons oscillating or what?

asked 2021-11-10

The diffuser in a jet engine is designed to decrease the kinetic energy of the air entering the engine compressor without any work or heat interactions. Calculate the velocity at the exit of a diffuser when air at 100 kPa and ${30}^{\circ}\{$ C enters it with a velocity of 350 m/s and the exit state is 200 kPa and ${90}^{\circ}\{C.$

asked 2022-08-11

The magnetic field (in tesla/gauss) of an electromagnet that is very small and has very few windings. For example 12 windings over 0.003 meters. I know this is not going to produce a very strong field, but I would like to pulse a strong current through the coil very briefly to make it stronger. I have found a number of sources listing the formula for the calculation of magnetic field strength

$B=\mu \rho I=\mu {\mu}_{0}\frac{N}{L}I$

where $N$ is the number of turns and $L$ the length of the core, e.g.

Question is

- can this formula be applied to my electromagnet design?

- Does the size and low number of windings on my electromagnet mean this formula is not valid?

- Is there any other way I can calculate/estimate the magnetic field?

$B=\mu \rho I=\mu {\mu}_{0}\frac{N}{L}I$

where $N$ is the number of turns and $L$ the length of the core, e.g.

Question is

- can this formula be applied to my electromagnet design?

- Does the size and low number of windings on my electromagnet mean this formula is not valid?

- Is there any other way I can calculate/estimate the magnetic field?

asked 2022-10-13

Electric reactive power? Is it real or is the design accepted for calculation?

asked 2022-07-17

How does an electromagnet work?