Lab 1 TF EIM - Revision history

Foretony: /* Smokey Circuits */

2015-01-20T17:44:33Z

Smokey Circuits

2015-01-20T17:44:17Z

Smokey Circuits

2015-01-20T17:43:53Z

Smokey Circuits

2015-01-16T00:50:51Z

Internal resistance (30 pnts)

2015-01-16T00:50:41Z

Internal resistance (30 pnts)

2015-01-16T00:50:31Z

Internal resistance (30 pnts)

2015-01-16T00:50:00Z

Internal resistance (30 pnts)

2015-01-16T00:40:04Z

Internal resistance (30 pnts)

2011-01-26T03:16:33Z

Enter the measured and predicted quantities in the table below

2011-01-12T06:10:18Z

Internal resistance (30 pnts)

@@ Line 11: / Line 11: @@
 Determine the maximum voltage of the DC power supply you will use. (ie, 30 Volts)
-;<math> P =I^2R = V^2/R< 1/4 </math> Watt
+;<math> P =I^2R = \frac{V^2}{R}< 1/4 </math> Watt
 ;<math> \Rightarrow R > \frac{V^2}{1/4 Watt}=\frac{\left (30 V \right)^2}{1/4 \mbox{Watt}} = 3600 \Omega</math>

@@ Line 12: / Line 12: @@
 ;<math> P =I^2R = V^2/R< 1/4 </math> Watt
-;<math> \Rightarrow R < \frac{V^2}{1/4 Watt}=\frac{\left (30 V \right)^2}{1/4 \mbox{Watt}} = 3600 \Omega</math>
+;<math> \Rightarrow R > \frac{V^2}{1/4 Watt}=\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.

@@ Line 11: / Line 11: @@
 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>
+;<math> P =I^2R = V^2/R< 1/4 </math> Watt
 :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.

← Older revision		Revision as of 00:50, 16 January 2015
Line 76:		Line 76:
	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.		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]][[File:TF_EIM_Lab1b_fig.png \| ~~400px~~]]	+	[[File:TF_EIM_Lab1a_fig.png \| 200px]][[File:TF_EIM_Lab1b_fig.png \| 350px]]

← Older revision		Revision as of 00:50, 16 January 2015
Line 76:		Line 76:
	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.		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]][[File:TF_EIM_Lab1b_fig.png \| ~~200px~~]]	+	[[File:TF_EIM_Lab1a_fig.png \| 200px]][[File:TF_EIM_Lab1b_fig.png \| 400px]]

@@ Line 97: / Line 97: @@
 <math>V_A - V_B = IR_{Load} = V_{bb} - I R_{int}</math>
-<math>Y = mx+b \Rightarrow R_{int} =</math> slope of V-vs- I plot
+<math>(V_A - V_B) = - R_{int} I +  V_{bb}</math>
 =Questions (20 pnts)=

@@ Line 94: / Line 94: @@
 |990 || ||
 |}
 =Questions (20 pnts)=

← Older revision		Revision as of 00:40, 16 January 2015
Line 76:		Line 76:
	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.		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]]	+	[[File:TF_EIM_Lab1a_fig.png \| 200px]][[File:TF_EIM_Lab1b_fig.png \| 200px]]

← Older revision		Revision as of 03:16, 26 January 2011
Line 52:		Line 52:


−	Given <math>V_A</math> and the values of all resistors, use Kirchoff's laws to ~~predict~~	+	Given <math>V_A</math> and the values of all resistors, use Kirchoff's laws to calculate BY HAND the

	a.) Predict the value of <math>V_B</math>		a.) Predict the value of <math>V_B</math>