Electricity and Resistance Lecture Review
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Vocabulary flashcards covering key concepts and terms from the lecture on electricity and resistance, including definitions and examples.
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12 Terms
Potential Difference (Voltage)
The natural tendency of a positive test charge to move towards a lower electrical potential.
Current (I)
The flow of electric charge through a material.
Resistance (R)
A measure of the opposition a material presents to the flow of electric current, dependent on factors like sample size and shape; high resistance leads to low current.
Ohm's Law
The relationship V = IR, stating that voltage (V) across a device is directly proportional to the current (I) through it and its resistance (R), assuming R is constant.
Static Resistance (Rs)
One of two types of resistance discussed, typically referring to the DC resistance or resistance at a specific operating point.
Dynamic Resistance (Rd)
The resistance calculated as the slope of the Voltage (V) versus Current (I) curve, indicating how resistance changes with varying conditions.
Carbon Resistor
An example of a component that exhibits linear Voltage vs. Current characteristics, implying its resistance is relatively constant.
Light Bulb
An example of a component whose Voltage vs. Current curve is not linear but is symmetric about the origin, indicating its resistance is not constant.
Diode
A circuit element that acts as a one-way valve for current, characterized by varying dynamic resistance (small slope for low Rd, large slope for high Rd) in different operating regions.
Experiment A: Carbon Resistor Parameters
An experiment involving a carbon resistor with noted resistance values between 33.1 and 33.5 ohms, and a failure rate between 0.001 and 0.033 Kr.
Experiment A: Resistance Value
A specific resistance value of 682 ohms observed or used in Experiment A.
Dynamic Resistance Calculations
Various numerical values and conversions (e.g., between volts, milliamps, and amps) related to the calculation of dynamic resistance as demonstrated in Experiment A.