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linux kid
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If magnetic fields aroung a coil of wire were turned on and off at a certain frequency, would it generate some form of energy?
We call these generators. Ok, that's a little sarcastic, but the principle of spinning windings past magnets has the effect you are talking about.linux kid said:If magnetic fields aroung a coil of wire were turned on and off at a certain frequency, would it generate some form of energy?
WhyIsItSo said:I suppose if you turned the magnetic fields on and off, you'd generate a square wave, while a generator creates a sine wave,
Which part are you talking about?ZapperZ said:Er.. you do?
The current generated in the coils would be proportional to the rate of flux across the coils' area, i.e. [itex]\frac{d\Phi}{dt}[/itex]. So if you have a sine wave, the time derivative of that would also be a sinusoidal wave with a phase shift (ignoring self induction).
WhyIsItSo said:Which part are you talking about?
In the hypothetical scenario where a magnetic field was either on or off, and oscillated between these states at a high enough frequency, would that not generate a square wave?
If referring to my comment about a generator, do they not create a sine wave? Is not a sine wave sinusoidal?
phun said:I think you'd get a train of delta functions (pulses) of electricity that way.
A magnetic field is a region of space where a magnetic force can be felt. It is created by moving electric charges and can be represented by lines of force.
A magnetic field is created by moving electric charges, while an electric field is created by stationary electric charges. Additionally, magnetic fields only exert forces on moving charges, while electric fields can exert forces on both moving and stationary charges.
Magnetic fields are used in many everyday objects and technologies. They are used in speakers, motors, generators, and MRI machines. Magnetic fields also play a crucial role in the Earth's magnetic field, which protects us from harmful solar radiation.
One way to visualize a magnetic field is by using iron filings. Sprinkle iron filings on a paper placed on top of a magnet and gently tap the paper. The filings will align with the magnetic field lines, giving a visual representation of the field.
Magnetic fields are generally considered safe for humans. However, exposure to high levels of magnetic fields, such as those found near power lines or in strong industrial magnets, can have potential health effects. It is important to follow safety guidelines and regulations when working with strong magnetic fields.