Electro Definition and 76 Threads

Using electro gravity tiles, there is an emerging technology that can generate electricity from moving vehicles. If we continue to populate the highways and roads, we might as well extract energy from their motion. How cool is that? :-p

If we build a High Temperature superconductor without Meissner effect ; So it can build energy?:confused:

When Studying the properties of matter, I came across the properties of Gravity, electromagnetism and electro static fields I'm Wondering: As Gravity and Magnetic Fields a alike and some formulas for finding out the gravity are the same could the three have the same properties. (I have not...

Is it possible to extend the range of an electromagnet? How would one do this?

Why an electro magnet use energy? the resistance is reason ?

Homework Statement Two point charges, Q1 and Q2, are located a distance 0.20 meter apart, as shown above. Charge Q1 = +8.0*10^-6C. The net electric field is zero at point P, located 0.40 meter from Q1 and 0.20 meter from Q2. Charge Q2 = -2.0*10^-6C. Determine the coordinate of the point R...

[SOLVED] Electro Box 1. Homework Statement : A cubic box of side a = .290 m is placed so that its edges are parallel to the coordinate axes. There is NO net electric charge inside the box, but the space in and around the box is filled with a nonuniform electric field of the following form...

:redface: 1. i need to design an electro magnet that can lift a 1 Kg weight vertically with the minimum cost possible ANYONE GOT ANY IDEAS and i need it to be very presize i mean the measurements thanx

Electro magnetic Induction problem. Simple one, but please check wehre I am wrong. Homework Statement A magnet moving down, goes through a coil and exits it below. Plot the graph showing variation of induced emf in coil with time. Homework Equations emf = - Flux/Time The Attempt...

which of the following electro magnetic waves has the lowest frequency? a) UV b) IR c) X ray d) microwave

1) The potential at location A is 441 V. A positively charged particle is released there from rest and arrives at location B with a speed vB. The potential at location C is 805 V, and when released from rest from this spot, the particle arrives at B with twice the speed it previously had, or 2...

A DOHC engine has the valves controlled by two servo motors, an engine speed encoder controls the valves possitions via electronics, this is an obviuos solution to four stroke ice valve control, what are the reasons why it is not used?

The auto industry will be using this method to contol inlet and exhuast valves, i think 6000 rpm is the limit so far with a 48v (coil), this system has many advantages ie variable valve timing/ dwell, what are the limitations of this idea and could it be retro fitted to cam shaft engines?

Electro magnets / DC / metal wire / vibrating? Hi, just a very basic question: I just tried making my own electro magnet (copper coil, steel core, connected to a 12V 2A DC power source) and i noticed that when i hold a metal wire (or just anything that's normally attracted by magnets) in...

Sir, When a current is passed through a conductor, a magnetic field is produced around it. Due to the flowing charges, is an electric field also produced around the conductor?

I can't find any sort of charts for the stregths of different metals that i could use as the core for my Electro Magnet(EM). some plans for a E.M. would be kinda cool to see too if anybody has any. (also, this is my first post on this site and i am really excited because I've been lookin...

Hi What is the difference between light (photons) and electromagnetic waves (eg radio waves)? According to some tables (like this ) the only difference is its wave length. But to me this doesen't make sense! i learned, that a photon just acts like a wave. furthermore a photon has got a mass...

This might be a silly one, but I'm a bit stumped: Suppose you have a 6V battery and an unlimited supply of 1 ohm resistors. How do you drop the potential from 6V to 4V using the resistors? Off the top of my head I think you just put two of the resistors into a series attached to the...

Please help with Griffiths Intro to Electro. Problem 3.41! I'm having much trouble with problem 3.41 in Griffiths intro to Electrodynamics...

we can calculate the charge flown through a wire loop by the formula change in magnetic flux divdided by the resistance of the loop in deriving this case we have neglected the self induction of the loop as df/dt =iR df/dt...

Hi all ! I have a few questions, mostly about electrical resistance. I'm afraid my pre-college physics training can't help much with any of them, but I was hoping you folks can :) 1) AFAIK, transistors can be used to break/restore the flow of current at will (i.e. act as an extremely high...

Ok , here's the deal , i would like to build a small electromagnetic train ... ( not really a train , but you know what i mean... no bigger than an "N" scale train , if you know anything about model trains) i just want a basic simple setup that goes in a circle ... no bigger than a dinner plate...

How do electro magnetic waves travel? if i am not mistaken waves are defiend as disturbances in a medium so do electro magnetic waves travel through a certain medium? if so how is this medium formed or does it exist every where in the universe and does not need to be formed ?

about electro static waves what is meant by the statement that "electro static waves follow the principle of super position"

Consider an infinate current carrying wire along the z-axis. Let I be the current in the wire and suppose that flowing electrons produce this current. The wire has no net charge density because the density of positive ions is assumed to compensate the density of flowing electrons. Let the...

A recent episode of NOVA, The Magnetic Storm, it had been said that, "According to generally accepted theory -- the dynamo theory -- interactions between the churning, twisting flow of molten material in the outer core and the magnetic field generate electrical current that, in turn, creates...