Electrostatics

strong

Easy, use magnetic fields with pins and needles. The electromagnetic attraction would pull or push the pins to in a direction.

yes, but the light that it will produce is dim

Because the main purpose of a toaster is to radiate heat. In order to

generate heat from electric current, resistance is required in the circuit.

A selenium coated drum is electrostaticly charged from a high voltage corona discharge. The charged drum is then exposed to light of an image of the original to be copied. The lighted areas become discharged, leaving only the dark areas still charged. The drum now passes over a tray of dark plastic toner beads, which are attracted to the charged areas of the drum and stick. The drum, with toner stuck to it in the pattern of the dark areas of the original now passes the blank sheet of paper to become the copy and a high voltage pulls the toner from the drum to the paper. Finally the paper with the toner on it is passed through a heated "fixer" that melts the toner into the paper. Now you have a copy.

First of all we have to consider the relationship between current flowing in a twin wire conductor, its resultant magnetic field, the EMF and the electric field between the conductors. The current flow produces a magnetic field that exists at right angles to it. Furthermore, a moving magnetic field will produce the reverse i.e. current. Additionally, the electric field produced by the EMF, exists at right angles to the magnetic field and the conducting surface. This relationship exists for DC, AC and Radio Frequencies (RF). It is essentially the 'golden rule', as electrical transmission cannot exist without these in place. Additionally, Nicola Tesla discovered that at frequencies at and above the radio spectrum, current does not exist throughout the cross-sectional area of the conductor - progressively only on the surface. This is known as skin effect. Thus at radio frequencies, if we shave the outside of a conductor and turn it inside out, the electro-magnetic wave moves along a metallic waveguide on the skin of the inner surface without the outer surface of the waveguide being affected i.e. acting as an insulator. The wave on the inside conforms to the requirements set out above: Current flows on the inside 'skin' at right angles to the magnetic field. This is known as wall current. An electric field exists at right angles to the magnetic field and the conducting surface. The waveguide is a rectangle and its dimensions are designed to support particular wavelengths. The wave formation inside is composed of alternating 'H' loops (magnetic filed) and 'E' diamonds (electric field). Extraction of the energy is only possible by providing an interruption to the wall currents. A slot cut at 90 degrees across the wall currents produces the greatest coupling and therefore the strongest output. It is possible to have a rectangular slot in a waveguide transmitting at great powers without any output i.e. its longer length aligns or is parallel with the wall currents. So the output can be controlled from provided a slot with no output at zero degrees to maximum output when a slot cuts the wall currents at 90 degrees. In summary, as long as the basic rules are met, as described in the first paragraph, a waveguide can transmit energy along its length.

When glass rod is rubbed with silk cloth it becomes positively charged and the silk cloth becomes negatively charged. This is because the glass rod looses electrons to the silk cloth which makes it positive and the silk cloth becomes negative.

Static electricity can damage electronics circuitry. Electrostatic discharge (ESD) safety is something that electronics firms spend millions of dollars on every year. If the IT person is tracking down a bug or reviewing protocols or assisting with training of staff, static electricity is not an issue. But if the IT professional has to open up a machine to replace a card or upgrade memory (to name two evolutions s/he might perform), this individual will want to take precautions. S/he will be wearing the proper static mitigation equipment that might include a wrist strap and possibly heel straps. ESD mats on a work table and on the floor may also be used as well as air ionization equipment. ESD "accidents" cause huge monetary loses to industry each year. And industry spends a great deal of money to train and equip team members in an attempt to cut off the loses. The IT professional will be part of this loop if s/he is doing anything inside any computer equipment.

no,it would probably be polyester cause it's very frilly so,it has more electrons since it's thicker than other fabrics.

http://www.kraftcanada.com/EN/CHOCOLATEPARADISE/WORKSHOP/HANDLINGCHOCOLATE/GratingChocolate.aspx

I don't know why for sure, but lack of humidity might play a part. This website helped me.

no.

If the resistance (R) remains constant the power P (i.e. rate of energy release) is proportional to the square of the current (I) P = R*I^2. So tripling the current will result in a nine-fold increase in power (d).

It sucks in smoke Smoke is made up of mostly solid substances dispersed in a gas. The electrostatic smoke precipitator generates static electricity, this then gives the solid particles passing through them a negative charge. The particles then pass through to two positively charged conducting plates and, due to their negative charge, they are attracted to the plates where they collect and form a layer.

Blood responds to force because blood is a fluid. The forces on it when it is pumped around the circulatory system can be studied and quantified. Medical science is quite good at this. From the point of view of physics, it is a problem in fluid mechanics. It is made more complex by the "irregular" action of the heart as a pump. The heart does not move blood in a continuous, even way. Rather, the heart applies "bursts" of compressive energy to support circulation. And the vessels through which the blood flows have some elastic qualities. Still, the way blood uses force has long been recognized, even though the sophisticated medical view we currently have has only unfolded over the last century or so. As an aside, the "bursts" of energy supplied by the heart are the only way the blood and circulatory system "like to be treated" in their support of life. A pump that does not "beat" but moves the blood in a smooth, continuous way, will not work to support life over a lengthy period. For a short term, like the way blood is mechanically moved by the machines used in operating theaters in support heart surgery, smooth-flowing blood circulation is acceptable, but all artificial hearts must "beat" in a way similar to the natural rhythm of the heart.

There are many reasons why electromagnets shouldn't be used. For example, permanent magnets are better to use economically because there is no cost of operation, like an electromagnet. There is also no maintenance or hardly any setup required. For permanent magnets, they can be used for a lot longer than electromagnets becausecan be used in hazardous places and are they are unaffected by shock or vibrations. Electromagnets require electricity to run, which costs money. They also burnout or lose its magnetism after a while.

There are also many reasons why electromagnets should be used. For an electromagnet, a person could easily control the power of the magnetism, unlike the permanent magnet which has the same intensity throughout. A person could also turn the power of the magnet on and off, which can become useful in certain situations. An electromagnet can also be made stronger than permanent magnets. The electromagnet also has a good field of depth, unlike the permanent magnets limited field depth.

It means that whatever the machine, circuit, device, or toy is that you're reading

about, it needs batteries in order to work, and that without them it'll just lay there

and do nothing. It almost certainly also means that you'll have to buy the batteries.

shot notes on lcd &tft

The batter for an 970LM-01 is a 2032.

....positive charge on paint, negative charge on the product. Very specialized equipment and techniques.

It is a variable resistor. Basically, the same as when you turn up or down the heat on an electrical oven or radio.

Strontium Titanate has a dielectric constant of 233.

TDK in Japan makes Ultra-high Voltage Ceramic Capacitors using this as the dielectric material.

Compared to distilled water at 76.7 - 78.2 (lowers as temperature rises).

Types of glass can vary between 4 and 10.

Given a positive charge the electric field lines are drawn starting from the charge and pointing radially outward, ending in principle at infinity, according to the electric field strength being proportional to the inverse square of distance. From the definition of electric field we know that the modulous of the electric field is greater for smaller distances from the field generating charge. Since the electric field lines point radially outward we consider the density of lines an indication of the strength of the electirc field. If we immagine to trace a circle around the electric field generating charge, of radius slightly greater than the radius of the object which holds the charge and therefore generates the electric field, such circle will be crossed by a number 'n' of lines. The density of lines crossing the cirle will then be the circumference of the circle divided by the number 'n' of lines. For a larger circle we will have a greater circumference, but same number of lines 'n', and therefore a smaller density of lines crossing it, which idicates a lower intesity of electric field for a greater distance from the charge.

The conductor attempts to cancel the field from its interior by creating an opposing field on its surface. Imagine a metal bus-bar oriented from left to right, say 3 feet long, 1 inch thick, 3 inches wide. The 3 inches is up and down. We generate a static field up and down of 10 volts per inch. The bus-bar will charge in the up and down direction to 30 volts, reverse polarity. The internal field will be zero. We are in a conductor. As long as there is field, current will flow, until the current causes an opposing field equal to the externally caused field. If you hollow out the bus-bar the inside will be field free. This is one way to make a Faraday cage or screen room. If the external field is AC, the opposing field will be AC. Current will flow on the surface in response to the AC. This same mechanism is responsible for skin effect, wherein current flow is restricted to a thin layer at the surface. This makes the resistance of the conductor appear much higher. At 60 hertz, this costs the electric companies of the world significant energy loss. At higher frequencies, skin effect gets much worse.

The charge all resides on the surface of the sphere, whether or not there's

anything inside the surface.

In principle, there's no limit on the amount of charge that can be jammed onto

the sphere. The only limit is a practical one, that is, how much charge you can

move and transfer to the sphere before it starts arcing back to the machinery

or the support that's holding it.

Only vector addition is applicable