AC vs DC - Revision history

Kwitsken3: /* The Main Idea */

2015-12-03T05:42:10Z

The Main Idea

← Older revision		Revision as of 01:42, 3 December 2015
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	[[File:AC vs DC Graph.gif]] [[File:Ac-vs-dc-o.gif]]		[[File:AC vs DC Graph.gif]] [[File:Ac-vs-dc-o.gif]]

	~~[https://trinket.io/glowscript/31d0f9ad9e Teach hands-on with GlowScript]~~

	==Advantages and Disadvantages==		==Advantages and Disadvantages==

Kwitsken3: /* The Main Idea */

2015-12-03T05:41:59Z

The Main Idea

← Older revision		Revision as of 01:41, 3 December 2015
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	[[File:AC vs DC Graph.gif]] [[File:Ac-vs-dc-o.gif]]		[[File:AC vs DC Graph.gif]] [[File:Ac-vs-dc-o.gif]]

	~~===A Mathematical Model===~~		[https://trinket.io/glowscript/31d0f9ad9e Teach hands-on with GlowScript]

	~~How do we visualize or predict using this topic. Consider embedding some vpython code here~~ [https://trinket.io/glowscript/31d0f9ad9e Teach hands-on with GlowScript]

	==Advantages and Disadvantages==		==Advantages and Disadvantages==

Kwitsken3: /* References */

2015-12-03T05:41:13Z

References

← Older revision		Revision as of 01:41, 3 December 2015
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	AC vs DC Image: http://blog.gogreensolar.com/2015/02/ac-vs-dc-breakers.html		AC vs DC Image: http://blog.gogreensolar.com/2015/02/ac-vs-dc-breakers.html

	Thomas Edison ~~Image: https://en.wikipedia.org/wiki/Thomas_Edison~~		Thomas Edison-Nikola Tesla Image: http://www.livescience.com/46739-tesla-vs-edison-comparison.html

	Nikola Tesla Image: ~~https~~://en.~~wikipedia~~.~~org~~/~~wiki/Nikola_Tesla~~

	Tesla Motor Image: http://www.teslasociety.com/hall_of_fame.htm		Tesla Motor Image: http://www.teslasociety.com/hall_of_fame.htm

	Industrial Usage Image: http://peguru.com/2011/03/ac-dc-power/		Industrial Usage Image: http://peguru.com/2011/03/ac-dc-power/

			AC vs DC GIF: http://www.physicsbook.gatech.edu/File:Ac-vs-dc-o.gif

	[[Category:Which Category did you place this in?]]		[[Category:Which Category did you place this in?]]

Kwitsken3: /* See also */

2015-12-03T05:39:19Z

Kwitsken3: /* How It Works */

2015-12-03T05:36:36Z

How It Works

← Older revision		Revision as of 01:36, 3 December 2015
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	Basically, a Direct Current (DC) power source consists of a battery and a resistor. This circuit is unidirectional, which means that the current can only travel on one direction. An Alternating Current (AC) is a bit more complicated. Rather than only going in one direction, AC current travels back and forth in a system in a sinusoidal pattern, meaning that between every wavelength, there is a time when the current is stopped. AC usually travels at about 60 Hz which means that objects like the lamps in our office are actually flickering on and off at such a fast pace that we don't even notice the periods when the lamp flickers off. Usually the way that such an AC circuit works is that there is a magnet that spins close to the circuit so that when the positive end of the magnet is facing upwards and the negative end is facing downwards, the electrons are flowing upwards throughout the circuit. Likewise, when the positive end of the magnet is facing downwards and the negative end is upwards, the electrons flow downwards. When this magnet spins and alternates whether the positive end is facing up or down, the electrons switch off going up or down in the circuit. This creates the sinusoidal wave that I mentioned above. The magnet spins so quickly (about 3600 rpm) that it is extremely difficult to tell that the light is flickering. Sometimes, if you wave your hand in front of a fluorescent light bulb you can see the flickering.		Basically, a Direct Current (DC) power source consists of a battery and a resistor. This circuit is unidirectional, which means that the current can only travel on one direction. An Alternating Current (AC) is a bit more complicated. Rather than only going in one direction, AC current travels back and forth in a system in a sinusoidal pattern, meaning that between every wavelength, there is a time when the current is stopped. AC usually travels at about 60 Hz which means that objects like the lamps in our office are actually flickering on and off at such a fast pace that we don't even notice the periods when the lamp flickers off. Usually the way that such an AC circuit works is that there is a magnet that spins close to the circuit so that when the positive end of the magnet is facing upwards and the negative end is facing downwards, the electrons are flowing upwards throughout the circuit. Likewise, when the positive end of the magnet is facing downwards and the negative end is upwards, the electrons flow downwards. When this magnet spins and alternates whether the positive end is facing up or down, the electrons switch off going up or down in the circuit. This creates the sinusoidal wave that I mentioned above. The magnet spins so quickly (about 3600 rpm) that it is extremely difficult to tell that the light is flickering. Sometimes, if you wave your hand in front of a fluorescent light bulb you can see the flickering.

	[[File:AC vs DC Graph.gif]]		[[File:AC vs DC Graph.gif]] [[File:Ac-vs-dc-o.gif]]

	===A Mathematical Model===		===A Mathematical Model===

Kwitsken3: /* Advantages and Disadvantages */

2015-12-03T05:34:36Z

Advantages and Disadvantages

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	===Direct Current (DC)===		===Direct Current (DC)===
	Direct Current power is more efficient when transferring power to smaller loads, such as a laptop or a cellphone. A battery is more effective and also doesn't have skips in the power supply that an AC has since its voltage is sinusoidal. Also, using AC requires a transformer when transferring power of large distances.		Direct Current power is more efficient when transferring power to smaller loads, such as a laptop or a cellphone. A battery is more effective and also doesn't have skips in the power supply that an AC has since its voltage is sinusoidal. Also, using AC requires a transformer when transferring power of large distances. Also a DC does not introduce reactance in the line which transfers to higher power transfer in the line. This leads to lower cost.

	===Alternating Current (AC)===		===Alternating Current (AC)===

Kwitsken3: /* Advantages and Disadvantages */

2015-12-03T05:30:39Z

Advantages and Disadvantages

← Older revision		Revision as of 01:30, 3 December 2015
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	===Direct Current (DC)===		===Direct Current (DC)===
			Direct Current power is more efficient when transferring power to smaller loads, such as a laptop or a cellphone. A battery is more effective and also doesn't have skips in the power supply that an AC has since its voltage is sinusoidal. Also, using AC requires a transformer when transferring power of large distances.

	===Alternating Current (AC)===		===Alternating Current (AC)===
			Alternating Current power is used in almost all home and office outlets. This is because it is more efficient when transferring power over large distances. Since P=IV, alternating current allows the supplier to greatly increase the voltage and lower the current so that there is no loss in energy through heat. If the current was very high, there would be a large loss of energy through overheating. Also, using DC only allows for buildings to be powered within a one mile radius which is ineffective when trying to power a whole town.

			[[File:Ac-vs-dc.jpg]]

	==Connectedness==		==Connectedness==

Kwitsken3: /* Examples */

2015-12-03T05:24:32Z

Examples

← Older revision		Revision as of 01:24, 3 December 2015
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	How do we visualize or predict using this topic. Consider embedding some vpython code here [https://trinket.io/glowscript/31d0f9ad9e Teach hands-on with GlowScript]		How do we visualize or predict using this topic. Consider embedding some vpython code here [https://trinket.io/glowscript/31d0f9ad9e Teach hands-on with GlowScript]

	==~~Examples~~==		==Advantages and Disadvantages==

	~~Be sure to show all steps in your solution and include diagrams whenever possible~~		===Direct Current (DC)===
			===Alternating Current (AC)===
	~~===Simple===~~
	===~~Middling~~===
	===~~Difficult~~===

	==Connectedness==		==Connectedness==

Kwitsken3: /* History */

2015-12-03T05:00:52Z

History

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	[[File:Tesla-edison-art.jpeg]]		[[File:Tesla-edison-art.jpeg]]
	Nikola Tesla Thomas Edison		Nikola Tesla Thomas Edison

	== See also ==		== See also ==

Kwitsken3: /* History */

2015-12-03T05:00:41Z

History

← Older revision		Revision as of 01:00, 3 December 2015
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	[[File:Tesla-edison-art.jpeg]]		[[File:Tesla-edison-art.jpeg]]
	Nikola Tesla Thomas Edison		Nikola Tesla Thomas Edison

	== See also ==		== See also ==

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                                      [[File:Tesla-edison-art.jpeg]]
                                          Nikola Tesla            Thomas Edison
 ==References==