Lab Report 1 - Revision history

Shaproma: Blanked the page

2011-01-20T00:15:51Z

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Shaproma at 00:15, 20 January 2011

2011-01-20T00:15:22Z

Shaproma: Blanked the page

2011-01-20T00:14:46Z

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Shaproma: /* Internal resistance (30 pnts) */

2011-01-17T23:52:33Z

Internal resistance (30 pnts)

Shaproma: /* Internal resistance (30 pnts) */

2011-01-17T23:51:09Z

Internal resistance (30 pnts)

Shaproma: /* Internal resistance (30 pnts) */

2011-01-17T23:43:52Z

Internal resistance (30 pnts)

Shaproma: /* Internal resistance (30 pnts) */

2011-01-17T23:43:05Z

Internal resistance (30 pnts)

Shaproma: /* Internal resistance (30 pnts) */

2011-01-17T23:42:54Z

Internal resistance (30 pnts)

Shaproma: /* Enter the measured and predicted quantities in the table below */

2011-01-17T06:37:55Z

Enter the measured and predicted quantities in the table below

Shaproma: /* Enter the measured and predicted quantities in the table below */

2011-01-17T06:34:50Z

Enter the measured and predicted quantities in the table below

← Older revision		Revision as of 00:15, 20 January 2011
Line 1:		Line 1:
−	~~[https://wiki.iac.isu.edu/index.php/Electronics_Lab_Reports_RS Go Back to All Lab Reports]~~

−
−	~~=Kirchoff's Law (50 pnts)=~~
−
−	~~== Smokey Circuits==~~
−
−	~~When doing these labs it is important to determine the limitations of your electrical components in order to avoid damaging them.~~
−
−	~~This lab uses resistors. Resistors are vulnerable to melting if you push too much current through them.~~
−
−	~~Resistors have power ratings ranging from 1/8 Watt up to several Watts. The common resistors are rated at 1/4 Watt. Let's assume this rating for the resistors in this lab.~~
−
−	~~Determine the maximum voltage of the DC power supply you will use. (ie, 30 Volts)~~
−
−	~~;<math> P =I^2R = V^2/R \Rightarrow R = \frac{V^2}{P} > \frac{\left (30 V \right)^2}{1/4 \mbox{Watt}} > 3600 \Omega</math>~~
−
−	~~:By keeping your resistance values above 3600 <math>\Omega</math> you should be able to avoid burning up 1/4 Watt resistors when your max voltage is 30 Volts.~~
−
−	~~The next objective is to use resistors which allow currents that you can measure with your voltmeter.~~
−
−	~~;Since <math>V=IR \Rightarrow I = V/R = 30 \mbox{Volts}/3600 \Omega = 8\mbox{mA}</math>~~
−
−	~~Determine the range of currents which the voltmeter can measure. (ie 1 mA)~~
−
−	~~To get measurable currents you need low resistance BUT the lower resistances will need to have a high power rating. These two competing properties limit the range of resistances you can use.~~
−
−
−	~~Select the three resistors you should use for this experiment.~~
−
−	~~==Construct the circuit below==~~
−
−
−	~~[[File:TF_EIM_Lab1.png \| 400 px]]~~
−
−
−
−	~~==Enter the values of the DC voltage and Resisters that you used.==~~
−
−	~~Use a voltmeter to measure the potential difference and resistances.~~
−
−	~~{\| border="3" cellpadding="20" cellspacing="0"~~
−	~~\|Variable \|\|Measured Value~~
−	\|-
−	~~\| <math>V_A </math> \|\| <math> (1.570 \pm 0.0005)</math> V~~
−	\|-
−	~~\| <math>R_1</math> \|\| <math> (99.4 \pm 0.05)</math> <math>\Omega</math>~~
−	\|-
−	~~\| <math>R_2</math> \|\| <math> (0.99 \pm 0.005)</math> k<math>\Omega</math>~~
−	\|-
−	~~\| <math>R_3</math> \|\| <math> (9.79 \pm 0.005)</math> k<math>\Omega</math>~~
−	\|}
−
−	~~==Enter the measured and predicted quantities in the table below==~~
−
−
−	~~Given <math>V_A</math> and the values of all resistors, use Kirchoff's laws to predict~~
−
−	~~a.) Predict the value of <math>V_B</math>~~
−
−	~~b.) Predict the values of the three currents.~~
−
−	~~[[File:Derivation.png \| 800 px]]~~
−
−	~~c.) compare your predictions and measurements by filling in the table below.~~
−
−	~~{\| border="3" cellpadding="20" cellspacing="0"~~
−	~~\|Variable \|\|Measured Value\|\| Predicted Value\|\| % Difference~~
−	\|-
−	~~\| <math>V_B</math> \|\| <math>(1.413\pm 0.0005)</math> V\|\| <math>(1.414\pm 0.0005)</math> V\|\| 0.07 %~~
−	\|-
−	~~\| <math>I_1</math> \|\| <math>(1.57\pm 0.005)</math> mA\|\| <math>(1.57\pm 0.005)</math> mA\|\| 0.00 %~~
−	\|-
−	~~\| <math>I_2</math> \|\| <math>(1.43\pm 0.005)</math> mA\|\| <math>(1.43\pm 0.005)</math> mA\|\| 0.00 %~~
−	\|-
−	~~\| <math>I_3</math> \|\| <math>(0.144\pm 0.005)</math> mA\|\| <math>(0.144\pm 0.005)</math> mA\|\| 0.00 %~~
−	\|}
−
−	~~= Internal resistance (30 pnts)=~~
−
−	Measure the internal resistance of a "D" cell battery by graphing the current on the x-axis and the measured voltage on the y-axis for several values of the resistance <math>R_L</math> shown in the circuit below. Begin with <math>R_L = 1k\Omega</math> and then decrease it by a factor of 5 for each subsequent measurement. You can use a volt meter to measure the current and potential difference.
−
−	~~[[File:TF_EIM_Lab1a_fig.png \| 200px]]~~
−
−
−
−
−	~~{\| border="3" cellpadding="20" cellspacing="0"~~
−	~~\| <math>R_{Load}</math> (<math>\Omega</math>) \|\| V (Volts)\|\| I (mA)~~
−	\|-
−	~~\|<math>(990\pm 0.5)</math>\|\| <math>(1.581\pm 0.0005)</math>\|\| <math>(1.60\pm 0.005)</math>~~
−	\|-
−	~~\|<math>(99.4\pm 0.05)</math>\|\| <math>(1.570\pm 0.0005)</math>\|\| <math>(15.60\pm 0.005)</math>~~
−	\|-
−	~~\|<math>(46.3\pm 0.05)</math>\|\| <math>(1.560\pm 0.0005)</math>\|\| <math>(32.41\pm 0.005)</math>~~
−	\|-
−	~~\|<math>(10.3\pm 0.05)</math>\|\| <math>(1.505\pm 0.0005)</math>\|\| <math>(123.5\pm 0.05)</math>~~
−	\|-
−	~~\|<math>(0.47\pm 0.005)</math>\|\| <math>(0.960\pm 0.0005)</math>\|\| <math>(1210\pm 50)</math>~~
−	\|}
−
−
−
−	~~[[File:RS lab1 pic4.png \| 600px]]~~
−
−	~~=Questions (20 pnts)=~~
−
−	~~#What conservation law is involved in Kirchoff's Loop Theorem?~~
−	~~#What does the slope in the internal resistance plot above represent?~~
−
−
−	~~[[Forest_Electronic_Instrumentation_and_Measurement]]~~
−
−	~~[https://wiki.iac.isu.edu/index.php/Electronics_Lab_Reports_RS Go Back to All Lab Reports]~~

← Older revision	Revision as of 00:15, 20 January 2011
Line 1:	Line 1:
	+	[https://wiki.iac.isu.edu/index.php/Electronics_Lab_Reports_RS Go Back to All Lab Reports]

	+
	+	=Kirchoff's Law (50 pnts)=
	+
	+	== Smokey Circuits==
	+
	+	When doing these labs it is important to determine the limitations of your electrical components in order to avoid damaging them.
	+
	+	This lab uses resistors. Resistors are vulnerable to melting if you push too much current through them.
	+
	+	Resistors have power ratings ranging from 1/8 Watt up to several Watts. The common resistors are rated at 1/4 Watt. Let's assume this rating for the resistors in this lab.
	+
	+	Determine the maximum voltage of the DC power supply you will use. (ie, 30 Volts)
	+
	+	;<math> P =I^2R = V^2/R \Rightarrow R = \frac{V^2}{P} > \frac{\left (30 V \right)^2}{1/4 \mbox{Watt}} > 3600 \Omega</math>
	+
	+	:By keeping your resistance values above 3600 <math>\Omega</math> you should be able to avoid burning up 1/4 Watt resistors when your max voltage is 30 Volts.
	+
	+	The next objective is to use resistors which allow currents that you can measure with your voltmeter.
	+
	+	;Since <math>V=IR \Rightarrow I = V/R = 30 \mbox{Volts}/3600 \Omega = 8\mbox{mA}</math>
	+
	+	Determine the range of currents which the voltmeter can measure. (ie 1 mA)
	+
	+	To get measurable currents you need low resistance BUT the lower resistances will need to have a high power rating. These two competing properties limit the range of resistances you can use.
	+
	+
	+	Select the three resistors you should use for this experiment.
	+
	+	==Construct the circuit below==
	+
	+
	+	[[File:TF_EIM_Lab1.png \| 400 px]]
	+
	+
	+
	+	==Enter the values of the DC voltage and Resisters that you used.==
	+
	+	Use a voltmeter to measure the potential difference and resistances.
	+
	+	{\| border="3" cellpadding="20" cellspacing="0"
	+	\|Variable \|\|Measured Value
	+	\|-
	+	\| <math>V_A </math> \|\| <math> (1.570 \pm 0.0005)</math> V
	+	\|-
	+	\| <math>R_1</math> \|\| <math> (99.4 \pm 0.05)</math> <math>\Omega</math>
	+	\|-
	+	\| <math>R_2</math> \|\| <math> (0.99 \pm 0.005)</math> k<math>\Omega</math>
	+	\|-
	+	\| <math>R_3</math> \|\| <math> (9.79 \pm 0.005)</math> k<math>\Omega</math>
	+	\|}
	+
	+	==Enter the measured and predicted quantities in the table below==
	+
	+
	+	Given <math>V_A</math> and the values of all resistors, use Kirchoff's laws to predict
	+
	+	a.) Predict the value of <math>V_B</math>
	+
	+	b.) Predict the values of the three currents.
	+
	+	[[File:Derivation.png \| 800 px]]
	+
	+	c.) compare your predictions and measurements by filling in the table below.
	+
	+	{\| border="3" cellpadding="20" cellspacing="0"
	+	\|Variable \|\|Measured Value\|\| Predicted Value\|\| % Difference
	+	\|-
	+	\| <math>V_B</math> \|\| <math>(1.413\pm 0.0005)</math> V\|\| <math>(1.414\pm 0.0005)</math> V\|\| 0.07 %
	+	\|-
	+	\| <math>I_1</math> \|\| <math>(1.57\pm 0.005)</math> mA\|\| <math>(1.57\pm 0.005)</math> mA\|\| 0.00 %
	+	\|-
	+	\| <math>I_2</math> \|\| <math>(1.43\pm 0.005)</math> mA\|\| <math>(1.43\pm 0.005)</math> mA\|\| 0.00 %
	+	\|-
	+	\| <math>I_3</math> \|\| <math>(0.144\pm 0.005)</math> mA\|\| <math>(0.144\pm 0.005)</math> mA\|\| 0.00 %
	+	\|}
	+
	+	= Internal resistance (30 pnts)=
	+
	+	Measure the internal resistance of a "D" cell battery by graphing the current on the x-axis and the measured voltage on the y-axis for several values of the resistance <math>R_L</math> shown in the circuit below. Begin with <math>R_L = 1k\Omega</math> and then decrease it by a factor of 5 for each subsequent measurement. You can use a volt meter to measure the current and potential difference.
	+
	+	[[File:TF_EIM_Lab1a_fig.png \| 200px]]
	+
	+
	+
	+
	+	{\| border="3" cellpadding="20" cellspacing="0"
	+	\| <math>R_{Load}</math> (<math>\Omega</math>) \|\| V (Volts)\|\| I (mA)
	+	\|-
	+	\|<math>(990\pm 0.5)</math>\|\| <math>(1.581\pm 0.0005)</math>\|\| <math>(1.60\pm 0.005)</math>
	+	\|-
	+	\|<math>(99.4\pm 0.05)</math>\|\| <math>(1.570\pm 0.0005)</math>\|\| <math>(15.60\pm 0.005)</math>
	+	\|-
	+	\|<math>(46.3\pm 0.05)</math>\|\| <math>(1.560\pm 0.0005)</math>\|\| <math>(32.41\pm 0.005)</math>
	+	\|-
	+	\|<math>(10.3\pm 0.05)</math>\|\| <math>(1.505\pm 0.0005)</math>\|\| <math>(123.5\pm 0.05)</math>
	+	\|-
	+	\|<math>(0.47\pm 0.005)</math>\|\| <math>(0.960\pm 0.0005)</math>\|\| <math>(1210\pm 50)</math>
	+	\|}
	+
	+
	+
	+	[[File:RS lab1 pic4.png \| 600px]]
	+
	+	=Questions (20 pnts)=
	+
	+	#What conservation law is involved in Kirchoff's Loop Theorem?
	+	#What does the slope in the internal resistance plot above represent?
	+
	+
	+	[[Forest_Electronic_Instrumentation_and_Measurement]]
	+
	+	[https://wiki.iac.isu.edu/index.php/Electronics_Lab_Reports_RS Go Back to All Lab Reports]

← Older revision		Revision as of 00:14, 20 January 2011
Line 1:		Line 1:
−	~~[https://wiki.iac.isu.edu/index.php/Electronics_Lab_Reports_RS Go Back to All Lab Reports]~~

−
−	~~=Kirchoff's Law (50 pnts)=~~
−
−	~~== Smokey Circuits==~~
−
−	~~When doing these labs it is important to determine the limitations of your electrical components in order to avoid damaging them.~~
−
−	~~This lab uses resistors. Resistors are vulnerable to melting if you push too much current through them.~~
−
−	~~Resistors have power ratings ranging from 1/8 Watt up to several Watts. The common resistors are rated at 1/4 Watt. Let's assume this rating for the resistors in this lab.~~
−
−	~~Determine the maximum voltage of the DC power supply you will use. (ie, 30 Volts)~~
−
−	~~;<math> P =I^2R = V^2/R \Rightarrow R = \frac{V^2}{P} > \frac{\left (30 V \right)^2}{1/4 \mbox{Watt}} > 3600 \Omega</math>~~
−
−	~~:By keeping your resistance values above 3600 <math>\Omega</math> you should be able to avoid burning up 1/4 Watt resistors when your max voltage is 30 Volts.~~
−
−	~~The next objective is to use resistors which allow currents that you can measure with your voltmeter.~~
−
−	~~;Since <math>V=IR \Rightarrow I = V/R = 30 \mbox{Volts}/3600 \Omega = 8\mbox{mA}</math>~~
−
−	~~Determine the range of currents which the voltmeter can measure. (ie 1 mA)~~
−
−	~~To get measurable currents you need low resistance BUT the lower resistances will need to have a high power rating. These two competing properties limit the range of resistances you can use.~~
−
−
−	~~Select the three resistors you should use for this experiment.~~
−
−	~~==Construct the circuit below==~~
−
−
−	~~[[File:TF_EIM_Lab1.png \| 400 px]]~~
−
−
−
−	~~==Enter the values of the DC voltage and Resisters that you used.==~~
−
−	~~Use a voltmeter to measure the potential difference and resistances.~~
−
−	~~{\| border="3" cellpadding="20" cellspacing="0"~~
−	~~\|Variable \|\|Measured Value~~
−	\|-
−	~~\| <math>V_A </math> \|\| <math> (1.570 \pm 0.0005)</math> V~~
−	\|-
−	~~\| <math>R_1</math> \|\| <math> (99.4 \pm 0.05)</math> <math>\Omega</math>~~
−	\|-
−	~~\| <math>R_2</math> \|\| <math> (0.99 \pm 0.005)</math> k<math>\Omega</math>~~
−	\|-
−	~~\| <math>R_3</math> \|\| <math> (9.79 \pm 0.005)</math> k<math>\Omega</math>~~
−	\|}
−
−	~~==Enter the measured and predicted quantities in the table below==~~
−
−
−	~~Given <math>V_A</math> and the values of all resistors, use Kirchoff's laws to predict~~
−
−	~~a.) Predict the value of <math>V_B</math>~~
−
−	~~b.) Predict the values of the three currents.~~
−
−	~~[[File:Derivation.png \| 800 px]]~~
−
−	~~c.) compare your predictions and measurements by filling in the table below.~~
−
−	~~{\| border="3" cellpadding="20" cellspacing="0"~~
−	~~\|Variable \|\|Measured Value\|\| Predicted Value\|\| % Difference~~
−	\|-
−	~~\| <math>V_B</math> \|\| <math>(1.413\pm 0.0005)</math> V\|\| <math>(1.414\pm 0.0005)</math> V\|\| 0.07 %~~
−	\|-
−	~~\| <math>I_1</math> \|\| <math>(1.57\pm 0.005)</math> mA\|\| <math>(1.57\pm 0.005)</math> mA\|\| 0.00 %~~
−	\|-
−	~~\| <math>I_2</math> \|\| <math>(1.43\pm 0.005)</math> mA\|\| <math>(1.43\pm 0.005)</math> mA\|\| 0.00 %~~
−	\|-
−	~~\| <math>I_3</math> \|\| <math>(0.144\pm 0.005)</math> mA\|\| <math>(0.144\pm 0.005)</math> mA\|\| 0.00 %~~
−	\|}
−
−	~~= Internal resistance (30 pnts)=~~
−
−	Measure the internal resistance of a "D" cell battery by graphing the current on the x-axis and the measured voltage on the y-axis for several values of the resistance <math>R_L</math> shown in the circuit below. Begin with <math>R_L = 1k\Omega</math> and then decrease it by a factor of 5 for each subsequent measurement. You can use a volt meter to measure the current and potential difference.
−
−	~~[[File:TF_EIM_Lab1a_fig.png \| 200px]]~~
−
−
−
−
−	~~{\| border="3" cellpadding="20" cellspacing="0"~~
−	~~\| <math>R_{Load}</math> (<math>\Omega</math>) \|\| V (Volts)\|\| I (mA)~~
−	\|-
−	~~\|<math>(990\pm 0.5)</math>\|\| <math>(1.581\pm 0.0005)</math>\|\| <math>(1.60\pm 0.005)</math>~~
−	\|-
−	~~\|<math>(99.4\pm 0.05)</math>\|\| <math>(1.570\pm 0.0005)</math>\|\| <math>(15.60\pm 0.005)</math>~~
−	\|-
−	~~\|<math>(46.3\pm 0.05)</math>\|\| <math>(1.560\pm 0.0005)</math>\|\| <math>(32.41\pm 0.005)</math>~~
−	\|-
−	~~\|<math>(10.3\pm 0.05)</math>\|\| <math>(1.505\pm 0.0005)</math>\|\| <math>(123.5\pm 0.05)</math>~~
−	\|-
−	~~\|<math>(0.47\pm 0.005)</math>\|\| <math>(0.960\pm 0.0005)</math>\|\| <math>(1210\pm 50)</math>~~
−	\|}
−
−
−
−	~~[[File:RS lab1 pic4.png \| 600px]]~~
−
−	~~=Questions (20 pnts)=~~
−
−	~~#What conservation law is involved in Kirchoff's Loop Theorem?~~
−	~~#What does the slope in the internal resistance plot above represent?~~
−
−
−	~~[[Forest_Electronic_Instrumentation_and_Measurement]]~~
−
−	~~[https://wiki.iac.isu.edu/index.php/Electronics_Lab_Reports_RS Go Back to All Lab Reports]~~

← Older revision		Revision as of 23:52, 17 January 2011
Line 102:		Line 102:


−	[[File:RS lab1 ~~pic3~~.png \| 600px]]	+	[[File:RS lab1 pic4.png \| 600px]]

	=Questions (20 pnts)=		=Questions (20 pnts)=

@@ Line 89: / Line 89: @@
 | <math>R_{Load}</math> (<math>\Omega</math>) || V (Volts)|| I (mA)
 |-
-|<math>(990\pm 0.5)</math>|| <math>(1.536\pm 0.0005)</math>|| <math>(1.56\pm 0.005)</math>
+|<math>(990\pm 0.5)</math>|| <math>(1.581\pm 0.0005)</math>|| <math>(1.60\pm 0.005)</math>
 |-
-|<math>(99.4\pm 0.05)</math>|| <math>(1.529\pm 0.0005)</math>|| <math>(15.20\pm 0.005)</math>
+|<math>(99.4\pm 0.05)</math>|| <math>(1.570\pm 0.0005)</math>|| <math>(15.60\pm 0.005)</math>
 |-
-|<math>(46.3\pm 0.05)</math>|| <math>(1.519\pm 0.0005)</math>|| <math>(31.82\pm 0.005)</math>
+|<math>(46.3\pm 0.05)</math>|| <math>(1.560\pm 0.0005)</math>|| <math>(32.41\pm 0.005)</math>
 |-
-|<math>(10.3\pm 0.05)</math>|| <math>(1.448\pm 0.0005)</math>|| <math>(121.8\pm 0.05)</math>
+|<math>(10.3\pm 0.05)</math>|| <math>(1.505\pm 0.0005)</math>|| <math>(123.5\pm 0.05)</math>
 |-
-|<math>(0.47\pm 0.005)</math>|| <math>(0.667\pm 0.0005)</math>|| <math>(1400\pm 50)</math>
+|<math>(0.47\pm 0.005)</math>|| <math>(0.960\pm 0.0005)</math>|| <math>(1210\pm 50)</math>
 |}
-[[File:RS lab1 pic2.png | 600px]]
+[[File:RS lab1 pic3.png | 600px]]
 =Questions (20 pnts)=

← Older revision		Revision as of 23:43, 17 January 2011
Line 102:		Line 102:


−	[[File:RS lab1 ~~pic1~~.png \| 600px]]	+	[[File:RS lab1 pic2.png \| 600px]]

	=Questions (20 pnts)=		=Questions (20 pnts)=

← Older revision		Revision as of 23:42, 17 January 2011
Line 102:		Line 102:


−	[[File:RS lab1 ~~pic1~~.png \| 600px]]	+	[[File:RS lab1 pic11.png \| 600px]]

	=Questions (20 pnts)=		=Questions (20 pnts)=

@@ Line 61: / Line 61: @@
 b.) Predict the values of the three currents.
-[[File:Derivation.png | 700 px]]
+[[File:Derivation.png | 800 px]]
 c.) compare your predictions and measurements  by filling in the table below.