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Electrical Wiring

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Do electrons lose energy or speed when they cross over a resistor?

Electrons lose energy when they pass through a resistor due to collisions with the atoms in the resistor material. This loss of energy manifests as heat. The speed of electrons may decrease as a result of this energy loss.

What is the resulting total resistance if two resistors having 5 and 10 ohms resistance are connected in parallel?

3.333 ohms

How do we calculate the answer?

It is calculated from the "Resistors In Parallel Connection Law" which is:

1 / RTOTAL = 1 / R1 + 1 / R2

In this case:

R1 = 5 and R2 = 10

So:

1 / RTOTAL = 1/5 + 1/10 = 0.2 + 0.1 = 0.3

So:

RTOTAL = 1 / 0.3 = 3.333

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For any number of resistors in parallel . . .

Total effective resistance = 1/(1/A + 1/B + 1/C + 1/D + . . . . .)

(If you're working with resistor combinations, then you're supposed to know this formula.)

If there are only two resistors in parallel, and you use the same formula and simplify it,

the total effective resistance turns out to be (A)x(B)/(A + B) .

(Just say to yourself "the product over the sum" and you'll remember it.)

When the two resistors are 5 ohms and 10 ohms, the total effective resistance is:

(5)x(10)/(5+10) = 50/15 = 31/3ohms

Is electricity the flow of electrons?

Yes, electricity is the flow of electrons through a conductor. When electrons move in a uniform direction, it creates an electric current, which is the basis of how electricity works in circuits and powering devices.

You rubbed two balloons together and they stuck together is it possible?

Yes, it is possible for two balloons to stick together after being rubbed together. This is due to a build-up of static electricity on the surface of the balloons, causing them to attract and stick to each other.

How is wind energy created?

About 1% of the solar energy that hits the earth turns into heat in the air. It makes the air rise. As the air rises, other air must move to take its place, and this is wind. A smaller amount of air motion comes from evaporated water, which weighs less than air and also rises. However, it takes a lot more energy to evaporate water than heat air, so this is a smaller effect.

What is a negatively charged matter?

Any material can be charged, either positively or negatively. It has no name as such. You can do that by shuffling your feet back and forth on a carpet and touching something. You can feel a spark from your finger. By shuffling your feet your body acquires a charge, which discharges when you touch a metal object that is grounded.

How is gold used in wiring?

Gold wire is often used to make gold jewelry such as necklaces or bracelets where its high value is part of the reason for using it, as well as the fact that it does not tarnish when exposed to the air. Gold is not often used for electrical wiring because of its high cost as a metal but it is often used to make the edge connectors on printed circuit boards because it does not wear away or tarnish as easily as silver or copper. For the same reason gold is sometimes used to make the contacts in electrical switches. Copper is the metal most used for wiring because it conducts electricity well without overheating. Copper is much cheaper to buy than silver or gold which can both conduct electricity even better than copper. However copper easily corrodes or tarnishes if it is exposed to the atmosphere because it is attacked by acids in the air: copper is sometimes used to cover a roof and over a long time such as 20 years it can often turn bright green! So copper wire that has to be used outside is usually protected by a plastic coating to keep the air away from it. If several wires are placed next to one another to make an electric cable then each wire is given a different colored plastic coating to help identify which wire is which and to insulate the wires safely from one another.

What caused a ceiling fan to start by itself?

You may have a bad switch with contacts that are very close together, which may inadvertently touch each other, closing the circuit and turning the fan on. Calling an electrician may be in order. He or she will be able to trouble shoot the exact cause and fix it safely.

How do you measure electrical pressure difference?

Electrical pressure difference, also called voltage, is measured using a voltmeter. The two points between which the voltage is to be measured are connected to the voltmeter, and the reading is displayed in volts.

True or false a three way light bulb has 3 filaments?

False. They contain two filaments which are first switched on independently of one another (the lowest two settings), then switched on simultaneously to produce the highest setting. For instance a bulb containing a 25 watt filament and a 50 watt filament will produce 25, 50 and 75 watts of light.

Why Does the filament in a bulb light up?

because it get very hot from resistive heating, is the simplest explantion. In a bit more detail, an incandescent object emits electromagnetic radiation in a band of frequencies determined by Planck's law. The filament is hot enough for the radiation to be in the visible band. for more info: http://en.wikipedia.org/wiki/Incandescent_light_bulb http://en.wikipedia.org/wiki/Incandescence http://en.wikipedia.org/wiki/Planck%27s_law

How do you make a horseshoe magnet?

In general, magnets are brittle and will break before they bend. And yes, refrigerator magnets bend, but in them the magnetic material is powdered. But if we took a bar magnet and bent it, we'd have a horseshoe magnet. It's not quite that simple to make a horseshoe magnet, but it isn't too tough, either.

What happens when you split light into a spectrum?

Scientists say that visible light's color is determined by its wavelength. A certain wavelength of light produces the color red, another yellow, another blue, etc. Normal white light, however, is made up of all the different wavelengths. When white light is passed through something that will refract (bend) it, such as a prism or a rain storm, it splits apart and the individual colors that make up the white light become visible.

What would be an a static electricity experiment?

Balloons are fun with static electricity. Rub a blown up balloon on the carpet and see if it will stick to a wall. Then rub a blown up balloon on the carpet and see what happens when you put it on or near your hair. Of course, there's always the old favorite of scooting across the carpet in your socks and touching the nose of your dog or cat with the tip of your finger. Have fun.

Explain the effects on frequency wavelength and energy as you move across the spectrum?

As you move from left to right across the electromagnetic spectrum, the frequency increases, the wavelength decreases, and the energy of the electromagnetic waves increases. This means that on the left side, you have low-frequency, long-wavelength, low-energy waves like radio waves, while on the right side, you have high-frequency, short-wavelength, high-energy waves like gamma rays.

How is wind energy converted into electrical energy?

When wind turns turbines, the turbines wheels turn belts, which in turn turns a generator. Inside the generator, a coil of copper spins between a couple of magnets. This creates an electrical field, which is made into DC current. The DC current passes through multiple rectifiers that convert the DC current into AC. AC is the type of current a typical household outlet uses. Then, the AC current runs to either your home or a power plant for distribution across several neighborhoods.

Does plastic wrap cling beacuse of static electricity?

Yes, plastic wrap does cling because of static electricity. Saran wrap is a material that easily becomes negative in charge. This means that more electrons gather onto this material. Human skin is a material that easily becomes positive in charge. As thus, it loses electrons. Due to the fact that both of these are oppositely charged objects, they attract to each other. This is why plastic wrap clings to your skin when you touch it. Hope this answer will help!

What color is A phase on a three phase busway?

A phase in a three-phase busway is typically identified by the color red. This color coding helps to easily distinguish between the different phases and prevent errors during installation and maintenance.

How do things conduct electricity?

To conduct electricity you have to have a power source and a ground. For example if you stick something metal into a house wall socket while holding onto it, the socket is the power source and you become the ground.

How do you run electricity to a barn?

Overhead or underground with a feeder circuit from another building, in accordance with national, state and local electrical codes. If it is closer to a utility pole than the other buildings, and needs a lot of power, consider having the power company run a separate drop and meter to the barn for you.

What causes static shocks?

Static shocks are caused by a build-up of static electricity on the surface of an object, such as your body, due to friction or contact with another object. When you come into contact with a conductor (metal, another person, etc.), the excess charge is released in a sudden flow of electricity, creating the shock sensation.

What happens to a parallel circuit if one light fails?

In a parallel circuit, if one light fails, the other lights will continue to work independently because each branch of the circuit is separate and unaffected by the failure of one component. This is in contrast to a series circuit, where the failure of one component would cause all components to stop working.

What color are the ground and hot wires for a 1986 fiero stereo?

There is orange wire which is hot all the time and is protected by a 25 amp fuse. There is also a yellow wire which is hot on accy or run and is protected by a 10 amp fuse. Be carful which yellow wire you use there may be two of them one is a power and one goes to the left rear speaker.

If the heating element is burned out on a clothes dryer does the dryer still pull 240V while running?

You will still have 240V going to the element itself it just won't be causing the element to heat up. Make sure the dryer is unplugged, take the back off the dryer and pull the element out. It's usually just a few screws. Mark and write down what wire goes where. The wires have clips that will slide right off the element, take it to your local hardware or appliance store with the dryer info and put it back on in the reverse order. Elements are usually pretty cheap.

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If the motor is 240V, then yes. It really depends on the dryer and what voltage devices are used inside it. If the dryer includes a motor to drive a fan, the motor may actually run at only 120V. Since the manufacturer has two possible voltages to work with, it can install whichever kind of motor is cheaper.

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As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.

If you do this work yourself, always turn off the power

at the breaker box/fuse panel BEFORE you attempt to do any work AND

always use an electrician's test meter having metal-tipped probes

(not a simple proximity voltage indicator)

to insure the circuit is, in fact, de-energized.

IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS

WORK SAFELY AND COMPETENTLY

REFER THIS WORK TO QUALIFIED PROFESSIONALS.

What materials can be charged with static electricity?

Materials that commonly become charged with static electricity include plastics, rubber, glass, and certain fabrics like polyester and wool. These materials tend to acquire a static charge when rubbed against each other or when exposed to friction or low humidity conditions.