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Electrostatics

Electrostatics is the branch of physics that deals with the study of charges at rest. A common electrostatic phenomena is plastic wrap sticking to your hand and itself when removed from the box. Everything to do with electrostatics goes in this category.

500 Questions

What do you mean by heating effect of current?

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The heating effect of current refers to the phenomenon where the flow of electric current through a conductor leads to the production of heat. This occurs due to the resistance offered by the conductor to the flow of electrons. The amount of heat produced is directly proportional to the square of the current and the resistance of the conductor.

Why does a balloon that has has static electric charge stick to the wall?

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A balloon that has a static electric charge can stick to a wall because opposite charges attract each other. The balloon carries a negative charge, while the wall carries a positive charge (due to electrons being transferred from the wall to the balloon). This attraction between the opposite charges causes the balloon to stick to the wall.

When you get zapped by static electricity what is happening?

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When you get zapped by static electricity, it means that there is an imbalance of electric charge on your body or on the object you touch. This causes a sudden flow of electrons to even out the charge, resulting in a small but quick electric shock or spark.

How do speakers use magnets to produce sound?

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Electricity and magnetism combine to create sound in a conventional speaker in a fairly simple way. The basis of this energy conversion isn't that difficult to understand. And yes, it is energy conversion - the conversion of electrical energy (the signal) to mechanical energy (the sound). And if you guessed that a microphone does the opposite conversion, you'd be correct. Let's break down the speaker a bit, but we need to do just a bit of review along the way. Electricity creates a magnetic field around its path of travel. Always. If we take some wire and roll a coil and pass electricity through it, it will create a magnetic field around the coil. (This is the basis for the electromagnetic.) If the electricity we pass through the coil is changing, then the magnetic field it generates will change. (The electromagnet uses direct current.) The changing field will cause the magnetic field around the coil to change. Hang onto that thought and lets look at one more thing. If we take our little coil of wire and attach it to a fairly rigid conically shaped piece of material, we'll have a speaker cone. We'll attach the outer edges of our cone to what is called a "surround" which is flexible. Then we'll attach our surround to a rigid frame. One more thing here. Remember our coil? The one on the cone? We're going to "hang" the cone so that a permanent is inside the coil. Remember that the cone and coil are one piece, and they can move out and in because the flexible surround allows that. And in the "neutral" position where the cone hangs with no signal, there is that permanent magnet (which is fixed to the back of the rigid frame that supports the cone) inside the coil. Got all that? We're set. If we apply a changing electrical signal to the coil, it sets up a changing magnetic field around the coil. This changing magnetic field interacts with the magnetic field of the permanent magnet. The interaction will create a force which will move the coil and cone assembly. It will move the assembly out and in according to the electrical signal. And as the cone moves out and in, it creates a sound wave. The speed at which the cone moves out and in will set the frequency of the sound (the pitch), and the amount the cone moves out and in on each cycle of the signal will set the amplitude of the sound (the volume). That's it! Really!

What are the 4 uses of static electricity?

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Paint spraying cars: the paint particles are given a negative charge, and the car frame is given a positive charge, so the paint sprays out, and sicks to the car, and is attracted to all the hard- to reach areas

Electrosatic precipitator; in coal fired power station theses are used to stop the dust particles reaching the atmosphere. Particles of ass pass through a charged grid, and becone charged. They then stick to plated either side of this grid, where they can be disposed of safely

Photocopier; A charged drum is in the photocopier. Light is then shone through the paper, and whete ther is no print light hits the drum and it looses its charge. This leaves charge where there needs to be ink. Ink is the pulled onto the charged drum, and transfered onto paper

Antistatic floors; to avoid static charges in hospital, the floors are made out of an antistatic material, so no charge can build up.

How is static electricity is used in printers?

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yes there is electrostatistics in a printer just the same way as vandigraph machine which is like a=n electrical thing when you touch your hair stands on end, if i say it like that maybe you will understand a vandigraph machine....hope that helpped

What technology uses static electricity?

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Piezoelectric discharge (some butane lighters)

What is static electricity and how does it work?

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This is just a charge that accumulates on something that is isolated from ground. Under some circumstances a charge may build up on your body and then you touch something that is grounded and you get a shock. This is the static electricity flowing to ground.

How many volts of static electricity can damage a computer?

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one But if you going to sit there with a multimeter to see what one or 1000 will be for a shock to your system, i recommend you build another project.

Does the electrons go from the battery plus to - or is it the other way around?

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Yes. The electrons, which are negatively charged, are pushed away from the negative terminal, which has excess electrons, and they and flow to the positive terminal where there are less electrons.

Is it safe for an electrition to carry out electical repairs outdoors during heavy downpour?

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No. During a heavy downpour, he is almost certain to get water inside his voltmeter

and ruin it. At the same time, the rungs on his ladder are likely to become wet and

slippery, posing a physical hazard if he attempts to ascend or descend the ladder.

Finally, his clothing is certain to become soggy and cold, leading to a severe bout

of the ague.

How do you discharge static electricity?

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If you touch the charged item to the ground, the charge will go into the ground. This is because static electricity is caused by either having too many or not enough elecrons. When toughed to the ground, the item will either get rid of the electrons or pick more up, making it neutral.

What is the minimum level of electrostatic discharge that a person can normally feel in computer?

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3000 Volts or more. This comes directly from the A++ Hardware book.

From ESD Association ESD Handbook ESD TR20.20 section 5.3.2.1:

"When people are charged with static electricity, they can release stored energy to conductive objects such as doorknobs and electronic circuits. This transfer of energy is called an electrostatic discharge. Sometimes the electrostatic discharge causes visible sparks, but more often, it is both unseen and unfelt. Electrostatic discharges can damage ESD sensitive components used in modern electronics.

Static electricity is a natural phenomenon that occurs in all climates and at all levels of relative humidity year round. Most people cannot feel an electrostatic discharge unless the static voltage is greater than 2000 volts. However, some electronic circuitry can be damaged by ESD that is less than 2000 volts. The damage can be done without people having any sensation of the ESD event.

When a wrist strap is worn properly and connected to ground, the person wearing it will stay near ground potential."

What is the best way to lower the calcium hardness in the water in the pool and the water used to fill it?

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The best way to lower calcium hardness in the pool water is to drain the water and refill with water of lower calcium hardness. Have the calcium hardness tested for both the pool water and fill water. Ideal range is 175-300ppm. There are 'calcium reducer' products available through pool stores, but not sure how effective or economical they are.

What is a sporting example of static strength?

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athletics: the hammer throw, shot put, discus

all three need strength and you improve on them the more and more you train.

Also in the Olympics: weight lifting, you need a lot of strength and the more you practice the better you get.

Hope i answered you question for you.

What is the attraction between two like charged things?

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There is no attraction between two like-charged things. Instead, repulsion between the things take place.

When you rub an air filles balloon with your dry hair and press it against the wall . Explain why?

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The friction from rubbing the balloon against your hair charges the balloon up with static electricity.