Response of Circuit Elements Data Partner: Name:
All resistances should be in Ohms, Ω, even if greater than 1000 Ohms,
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Carbon Resistor |
Light Bulb |
Diode (PS) Power Supply Voltage |
Rforward
Rreverse |
Carbon Resistor
static ß slope calcs below (or Excel, etc) à dynamic
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Color Code Rcode = Rmeter = |
Rmeter |
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Volt-meter (Volts)) |
I (mA) |
Volt-meter (Volts) |
I (mA) |
PS |
Volt meter |
I (mA) |
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5.0 |
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40 |
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4.5 |
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35 |
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4.0 |
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30 |
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Light Bulb (Always include units) Please see Pre-Lab for help
Show calculations of your local slopes (e.g. tangent lines) below
Determine the cold static & dynamic resistance near V=0 cold static cold dynamic
Determine the hot resistances near V = ± 5V hot +5V hot -5V
Which of these does the Ohmmeter most nearly agree? (circle answer) (a) cold static, (b) cold dynamic, (c) hot at +5V, (d) hot at -5V
Explain why this is true. |
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3.5 |
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25 |
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3.0 |
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20 |
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2.5 |
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15 |
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2.0 |
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10 |
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1.5 |
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5 |
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1.0 |
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3 |
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0.7 |
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2.5 |
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0.5 |
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2 |
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0.3 |
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1.5 |
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0.2 |
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1 |
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0.1 |
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0.5 |
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0.08 |
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-0.5 |
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0.06 |
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-1 |
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-1.5 |
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-2 |
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-0.06 |
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-2.5 |
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-0.08 |
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-3 |
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(1520 ONLY) Light Bulb Color Temperature Agreement |
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-0.1 |
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-5 |
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DarkRed~700° |
Red |
Yellow~1100° |
White |
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-0.2 |
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-10 |
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V |
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-0.3 |
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-15 |
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I |
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-0.5 |
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-20 |
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R |
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-0.7 |
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-25 |
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How do the resistances compare with the handbook value of 0.0045 °C-1
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-1.0 |
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-30 |
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-1.5 |
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-35 |
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-2.0 |
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-40 |
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-2.5 |
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Diode Show slope calcs below from your graph Determine the dynamic resistance in the reversed bias direction near V = -2V, and in the forward direction near I = 1 mA. -2V 1 mA
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-3.0 |
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-3.5 |
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-4.0 |
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-4.5 |
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-5.0 |
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Collect as much data near 0 Volts as allowed by your multimeter |
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NOTE: To calculate slopes one must draw in tangent lines to the smooth curve at point of interest (i.e. hot resistance near ± 5V). Obtain slope points for these tangent lines then calculate slope. on analysis. All graphs MUST be full page. |
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