One direction vs AC/DC?
AC/DC i guess. They were good on the first album, and every time they re-recorded it with a different name.
Why does an AC change it’s direction, and a DC current does not change it?
Well the terms are defined that way! This is not a why question. “AC” means Alternating current, which means the current flows first one way, then the other, 50 or 60 times a second. “DC” means direct current, which means the current flows in one direction only, all the time.Maybe you meant to say “how” does AC do that? It is made that way! AC is naturally what you get when you wind a generator. When you spin a magnet inside a coil of wire, or spin a coil of wire inside a magnetic field, the direction of the current changes every time the magnet North and South poles switch positions relative to the coil of wire.AC has a bunch of advantages, such as you can change its voltage using transformers, which you can’t do with DC. These things make AC generally easier to use for electrical distribution systems.
How much does it cost to run an air conditioner?
The cost of operating a room air conditioner varies according to several factors, including the following: • the EER and cooling capacity of the air conditioner; • the temperature setting you use; • whether you run the fan on “continuous” or “auto” mode; • which of the unit’s features you choose to use; • how often you use the unit; • the price of electricity; and • the weather. To estimate the energy cost of a specific room air conditioner before you buy it, multiply the unit’s energy consumption by the price of electricity in your region. Worksheet 2 (below) will help with this calculation.
Why is alternating current better for long-distance power transmission than direct current?
AC can be stepped up and down in voltage very easily by transformers and the bigger the voltage the lesser the current. You tend to get less losses to resistance when distributing AC over long distances too. You can use thinner wires which means they’re cheaper to make and suspend.At the power station you can ramp up to thousands of volts and very little current through a step-up transformer. In the UK commonly seen voltages at the consumer end are 230V (residential, commercial, light industry) and 440V (industrial) and the same high voltages sent from the power station are ramped down again through a step-down transformer. In this way you get current back.It’s much easier to generate AC than DC too due to the way the generators turn.All in all, it’s better to have a cheaper system for the long overland haul of a national grid system where there’s miles of wire, lots of pylons to support it and the back infrastructure is minimal.That’s not to say you can’t or don’t do it with DC though. There’s one in Brazil that stretches for nearly 1,500 miles. Transmitting DC in this way is called, unsurprisingly, High Voltage Direct Current ( HVDC ). This is used in inter-country transfers; you can transmit HVDC into an AC grid of any frequency.Undersea cables are almost always HVDC because they act as capacitors, and being so long, big ones. AC would charge and discharge the capacitors and you’d probably end up using all the juice just in combatting the capacitance. HVDC charges it only when the voltage is first applied or changes. Strangely the one between England and the Isle of Man is AC. At 65 miles long it’s the longest AC underwater connector in the world and carries 90,000V. Why they chose AC I’ve no idea, there must have been some compromise between cost and technical efficiency but I don’t know what it was and it just goes to show.So it’s not a case of being better, it’s just that one is suited to certain circumstances more effectively than the other, and whatever the circumstances are you choose the system to fit.
Quick Question; Led Zeppelin or Metallica.?
Led Zeppelin - genre rock and roll, style heavy metal. One of the greatest rock bands of all time. Legendary lead guitarist. Lead singer basically invented the sound of heavy metal vocals. The drummer was undisputedly one of the all time greatest drummers. A bassist/keyboardist/rhythm guitarist/backingvocalist/writer/arrange... who is a blooming genius! Metallica plays what? post punk? not very good guitar player, most boring drummer in the world, on the 3rd bassist? the best guy ever in the band was the 2nd bassist that they all hated, the singer is the most talented member of the band and is nothing special. Listen to the music and the variety of music they play. It's not even a question of style or era. To say Metallica is better than Led Zeppelin is like comparing Mozart to someone farting and saying fars are better than Cosi fan Tutti.
Why is generated voltage or the d.c current can not firstly be transmitted?
Efficient long distance transmission requires high voltage at low current. With AC, transformers are used to multiply to potential up to thousands of volts. Then relatively thin wires carry it across country and then other transformers are used to reduce it back down to a usable voltage. DC does not work with transformers. Thomas Edison believed that DC rather than AC should be used. He thought that sufficient power plants should be built so that no user was farther than 1 mile from his power source.