by Ron Kurtus
You can read them to further your understanding of the subject.
|DC||Electromotive force and potential difference||Pakistan|
|Generating Electricity||Explain the working principle of a transformer||Nigeria|
|General||Difference between electrical and electronics||USA|
|AC||This is a really awesome and informative site||USA|
|DC||Wants more questions||India|
|DC Circuits||How is parallel circuit different than series circuit?||USA|
|Electrical Charges||What is Electricity?||India|
|DC||Using a ground wire to light a lamp with AC||USA|
|AC||What is the purpose of the neutral wire in a circuit||Pakistan|
|AC||How does a 220 volt AC baseboard heater work?||USA|
Electromotive force and potential difference
May 2, 2012
define electromotive force and potential difference?
muneeb - Pakistan
Electromotive force (emf) is the voltage created by a battery or DC generator. It is not considered a true "force".
Electrical potential difference is the voltage difference between two points, such as between the terminals in a battery. It is equal to the work needed to move a unit charge between the two points.
Explain the working principle of a transformer
Topic: Generating Electricity
March 18, 2012
explain the working principle of a tranformer
feminton - Nigeria
See Alternating Current (AC) Transformers for an explanation with a picture.
Difference between electrical and electronics
March 18, 2012
What is the difference between ELECTRICAL and ELECTRONICS?
Electrical usually concerns electrons flowing through a wire. It can be either AC or DC electricity and it used to power various devices.
Electronics concerns using the movement of electrons in electrical circuits to control the flow of information, as well as to process signals. Transistors and integrated circuits can be used to amplify weak electrical signals, as well as to count and calculate information from the input.
This is a really awesome and informative site
February 21, 2012
This is a really awesome and informative site. Thank you!
Ti - USA
thanks for the feedback. I'm glad the site has been useful to you. Best wishes for success in your studies.
Wants more questions
January 26, 2012
want more questions relating to this chapter?
Lathika - India
We should be adding more questions in the near future.
How is parallel circuit different than series circuit?
Topic: DC Circuits
January 25, 2012
i didn't understand how a parallel circuit is wired different than a series circuit.can you explain?
ignacio - USA
The illustrations in Direct Current (DC) Electrical Circuits shows how a series circuit has its resistors in a line, one after another, while a parallel circuit has the resistors going across the circuit but parallel to each other.
What is Electricity?
Topic: Electrical Charges
January 14, 2012
What is Electricity ?
Atish - India
Static electricity is the collection of electrical charges on the surface of a non-conducting material. AC and DC electricity is the movement of electrons through a conducting material, like copper wire.
Using a ground wire to light a lamp with AC
November 30, 2011
Using a light with two wires, and I touch a AC power sourse on one side and touch a earth ground on the other side the lamp will light up. If I use a DC power sourse (battery charger) and touch touch one side (hot) and touch a earth ground on the other side the lamp will not lite. Why?
Rodger - USA
You need a complete circuit for the power source to light the lamp. With a DC source, you would normally connect wires from the positive (+) and negative (-) terminals to the lamp. But you could connect one wire from the DC source to the ground and another wire from the ground to the lamp. However, it would depend on the resistance of the ground.
With AC, ground often splits the voltage. If part of the AC circuit has been grounded, then when you use a wire to ground with your lamp, the circuit is then completed. It is sort of an unusual situation.
What is the purpose of the neutral wire in a circuit
November 24, 2011
what is neutral and its purpose or current flow in a circuit?
usman - Pakistan
In a 3-wire AC system, the neutral is the zero point between the other two wires. It is often connected to the ground or earth wire, as a way to protect against added DC voltages.
In the U.S., 220 VAC comes to the house, but only half of the voltage is used, with a hot wire and the common or neutral wire. This allows both 110 VAC and 220 VAC to be used in the house. Most countries don't use that system.
How does a 220 volt AC baseboard heater work?
November 17, 2011
How does a AC 220 volt baseboard heater work ? Do not understand how putting 110 in one end and 110 in the other end can make it work, How does the circut get completed? Also why are earthworms not getting shocked when power is passing to your home grounding rod.
Willie - USA
US house current is usually 220 VAC but is split to become 100 VAC with respect to the common or ground. Although the black wire is considered hot, the white also has AC with respect to the common or ground. A typical way to wire a 220 V heater is to use the black and white wires and not use the ground.
Grounding is mainly used to have a common zero point for DC. Often AC circuits have a floating DC component, which could shock a person. However, touching a grounded wire will not give you a shock, as long as you aren't touching metal that has a voltage.
Although worms are attracted to grounding rods, they would need to be in contact with a DC or AC wire to have the current go through them and give them a shock.
Hopefully, this reader feedback has helped provide information about Electricity issues.
Resources and references
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