Power in a circuit - Revision history

Fishergreen: /* External links */

2015-12-01T00:16:35Z

External links

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	===External links===		===External links===
	https://openstaxcollege.org/files/textbook_version/low_res_pdf/9/CollegePhysics-LR.pdf		https://openstaxcollege.org/files/textbook_version/low_res_pdf/9/CollegePhysics-LR.pdf

	https://en.wikipedia.org/wiki/Electric_power		https://en.wikipedia.org/wiki/Electric_power

Fishergreen: /* References */

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References

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	http://mechatronics.mech.northwestern.edu/design_ref/sensors/potentiometers.html		http://mechatronics.mech.northwestern.edu/design_ref/sensors/potentiometers.html

	http://hyperphysics.phy-astr.gsu.edu/hbase/electric/elepow.html		http://hyperphysics.phy-astr.gsu.edu/hbase/electric/elepow.html

	https://openstaxcollege.org/files/textbook_version/low_res_pdf/9/CollegePhysics-LR.pdf		https://openstaxcollege.org/files/textbook_version/low_res_pdf/9/CollegePhysics-LR.pdf

	http://micro.magnet.fsu.edu/electromag/java/ohmslaw/		http://micro.magnet.fsu.edu/electromag/java/ohmslaw/


	[[Category:Simple_Circuits]]		[[Category:Simple_Circuits]]

Fishergreen: /* References */

2015-12-01T00:14:51Z

References

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

Fishergreen: /* See also */

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Fishergreen: /* See also */

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Fishergreen: /* See also */

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Fishergreen at 00:10, 1 December 2015

2015-12-01T00:10:15Z

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	~~Short Description of Topic~~

	==The Main Idea==		==The Main Idea==
	Measuring the power in a circuit can provide useful insight into the ability of a circuit to accomplish a given task. In order to understand how to calculate and interpret power in a simple circuit, one must know the mechanical definition and significance of [[Power]]. For this section, we will be using the unit of Watt for power.		Measuring the power in a circuit can provide useful insight into the ability of a circuit to accomplish a given task. In order to understand how to calculate and interpret power in a simple circuit, one must know the mechanical definition and significance of [[Power]]. For this section, we will be using the unit of Watt for power.

Fishergreen: /* Examples */

2015-12-01T00:09:54Z

Examples

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	==Examples==		==Examples==

	~~3 varying examples.~~

	===Simple===		===Simple===

Fishergreen: /* The Main Idea */

2015-12-01T00:09:39Z

The Main Idea

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	Measuring the power in a circuit can provide useful insight into the ability of a circuit to accomplish a given task. In order to understand how to calculate and interpret power in a simple circuit, one must know the mechanical definition and significance of [[Power]]. For this section, we will be using the unit of Watt for power.		Measuring the power in a circuit can provide useful insight into the ability of a circuit to accomplish a given task. In order to understand how to calculate and interpret power in a simple circuit, one must know the mechanical definition and significance of [[Power]]. For this section, we will be using the unit of Watt for power.

	It is important to note that the power in parts of a circuit can be represented in several different ways. Most commonly, power in a circuit is expressed in terms of Voltage (E, Emf, Volts), Current (I, Amps), and Resistance (R, Ohms). It is typical to focus a discussion of power in a circuit around the power that is dissipated by a resistor. The power dissipated by a resistor directly coincides with the amount of energy that the resistor converts into non-electrical energy such as thermal or light energy.		It is important to note that the power dissipated throughout parts of a circuit can be represented in several different ways. Most commonly, power in a circuit is expressed in terms of Voltage (E, Emf, Volts), Current (I, Amps), and Resistance (R, Ohms). It is typical to focus a discussion of power dissipated in a circuit around the power that is dissipated by a resistor. The power dissipated by a resistor directly coincides with the amount of energy that the resistor converts into non-electrical energy such as thermal or light energy.
	===A Mathematical Model===		===A Mathematical Model===

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	From the graph, it becomes clear that as resistance increases, the power dissipated by the resistor decreases.		From the graph, it becomes clear that as resistance increases, the power dissipated by the resistor decreases.
	This also ~~graph~~ models how using a potentiometer or variable resistor would effect the power dissipation in a 12 volt circuit.		This graph also models how using a potentiometer or variable resistor would effect the power dissipation in a 12 volt circuit.

	==Examples==		==Examples==

Fishergreen: /* Examples */

2015-11-30T23:48:43Z

Examples

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	===Difficult===		===Difficult===
	A circuit switches from a power supply with 6 volts to a power supply with 12 volts, what is the change in power dissipation if the circuit contains two 4 Ohm resistors wired in parallel?		A circuit switches from a power supply with 6 volts to a power supply with 12 volts, what is the change in power dissipation if the circuit contains two 4 Ohm resistors wired in parallel?
			[[File:Circuit_power_problem_3.png]]

	First, we calculate the total resistance of the circuit. Since the resistors are in parallel, we must use the equation: <math>1/R_t=1/R_1+1/R_2</math>		First, we calculate the total resistance of the circuit. Since the resistors are in parallel, we must use the equation: <math>1/R_t=1/R_1+1/R_2</math>

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	== See also ==		== See also ==
	[[Ohm's_Law]]		[[Ohm's_Law]]

	[[Current]]		[[Current]]

	[[Series Circuits]]		[[Series Circuits]]

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	[[Current]]		[[Current]]
	[[Series Circuits]]		[[Series Circuits]]


	===External links===		===External links===

← Older revision		Revision as of 20:13, 30 November 2015
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	== See also ==		== See also ==
			[[Ohm's_Law]]
			[[Current]]
			[[Series Circuits]]

	~~Are there related topics or categories in this wiki resource for the curious reader to explore? How does this topic fit into that context?~~

	~~===Further reading===~~

	~~Books, Articles or other print media on this topic~~

	===External links===		===External links===
			https://openstaxcollege.org/files/textbook_version/low_res_pdf/9/CollegePhysics-LR.pdf
	~~Internet resources on this topic~~		https://en.wikipedia.org/wiki/Electric_power

	==References==		==References==