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What formula calculates the current drawn by the transformer for mains electricity?
p=r*i
What does ac stand for the mains voltage supplied in the UK?
AC stands for Alternating Current and DC stands for Direct Current.
How do electrons flow on an ac source?
With electricity from the mains, the current chages direction 50 times each second, so it is called alternating current.
What is DC in electric stand for?
Volts direct current eg battery As opossd to Vac wich is volts altinating current eg mains supply
What is sinusoid?
What is a sinusoidal wave? This is a wave that appears to have curves. AC current/voltage. If you see a wave on a ossiloscope of what our AC (Alternating current) mains voltage that will be the answer to the question. DC (direct current) does not appear to have the same qualitys
What is difference between battery and mains electricity?
Mains supply provides alternative current while battery provides direct current.
What you get from mains voltage or current?
You get power, which is voltage * current (so both!).
What formula calculates the current drawn by the transformer for mains electricity?
p=r*i
Why is direct current used for mains electricity?
We're deeply intrigued to know where the questioner resides, and from what experience this question arises. We know of no location in the world, and no small-scale situation, where direct current is preferred for the mains supply.
A 2 KW iron is used on a 100 V AC mains The current in the iron is?
The current in the iron will be 5 amperes.
What does ac stand for the mains voltage supplied in the UK?
AC stands for Alternating Current and DC stands for Direct Current.
Advantage of current limiting?
Current limiting is the practice in electrical or electronic circuits of imposing an upper limit on the current. The simplest form of current limiting in mains is fuse.
Who do you contact to have mains electric cable laid to your property?
The electrical supply authority for your area
What is the difference between mains electricity and batteries?
The first difference is that mains power is AC (Alternating Current) whereas batteries are DC (Direct Current). The second difference is the amount of available amperage; mains have the capacity to deliver higher current for an indefinite amount of time, where batteries will drain faster the more current is pulled. Your normal A/AA/C/D/9V batteries only produce 500 milliamps (1/2 an amp) at their nominal voltage (1.5 or 9v). Mains current (for the U.S.) is 110 or 220 volts in residential. Commercial mains, such as in factories, can be 110, 208, 220, or 440 volts. A big difference between residential and commercial electricity is the available phasing. But that's another discussion.
When connecting a mains polarity test between the neutral and earth connections what should the reading be?
Infinity
How do you pat test it equipment?
PAT testing in an office is usually reasonably straight forward as most of the testing in a modern office is IT (PCs, Monitors, Printers and Communications Equipment etc) either class I or II. The biggest danger when testing IT and Communications equipment is not damaging the electronic circuits with the test, it is loss of data. Best practice to prevent loss of data is to seek permission from the responsible person (The person in charge of the area). Better still, get them to shut the systems down and make sure they bring them back up after the test to prove the system. However there can be problems of access particularly under desks etc. If you have a mains powered tester, access to a mains source under the desk can also be a problem. When testing offices you might like to consider a battery operated PAT tester which for the earth continuity test and insulation test will not require a mains source. However, if you wish to use the load leakage or touch current test where the appliance has to be powered up, you will need to plug the tester into a mains socket and not all battery testers have this feature. When testing modern IT equipment it is not normal to performed a leakage or touch current test; these tests are usually used on older equipment in place of the 500 Volt insulation test.
What is the purpose of a thermal fuse?
To break the circuit if the temperature of it exceeds the rated current. Used in mains frequency transformers to disconnect it from the mains if it gets above a certain temperature to prevent it from catching fire.
