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Questions and Answers
According to Ohm's law, the current is proportional to the electric field.
According to Ohm's law, the current is proportional to the electric field.
- True (correct)
- False
The Drude model treats electrons like pinballs bouncing among the ions that make up the material.
The Drude model treats electrons like pinballs bouncing among the ions that make up the material.
- True (correct)
- False
According to the Drude model, the average drift velocity of electrons is proportional to the electric field.
According to the Drude model, the average drift velocity of electrons is proportional to the electric field.
- False
- True (correct)
Ohm's law is always obeyed by all materials under any electric field.
Ohm's law is always obeyed by all materials under any electric field.
Which equation represents Ohm's law?
Which equation represents Ohm's law?
What does Ohm's law state about the resistance in the relation?
What does Ohm's law state about the resistance in the relation?
What are materials that do not obey Ohm's law called?
What are materials that do not obey Ohm's law called?
Who conducted experiments with Leyden jars and glass tubes filled with salt solution to measure the current in 1781?
Who conducted experiments with Leyden jars and glass tubes filled with salt solution to measure the current in 1781?
Who delineated 'intensity' (voltage) and 'quantity' (current) for the dry pile in 1814?
Who delineated 'intensity' (voltage) and 'quantity' (current) for the dry pile in 1814?
Who published the book 'Die galvanische Kette, mathematisch bearbeitet' in 1827?
Who published the book 'Die galvanische Kette, mathematisch bearbeitet' in 1827?
Who proposed the first (classical) model of electrical conduction, the Drude model, in 1900?
Who proposed the first (classical) model of electrical conduction, the Drude model, in 1900?
Flashcards
Ohm's Law proportionality
Ohm's Law proportionality
Current is directly proportional to the electric field strength.
Drude Model
Drude Model
Electrons move randomly and collide like pinballs within a material's ionic structure.
Drude Model: Drift Velocity
Drude Model: Drift Velocity
The average speed of electrons moving through a material is directly related to the electric field applied.
Ohm's Law Equation
Ohm's Law Equation
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Ohm's Law: Constant Resistance
Ohm's Law: Constant Resistance
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Non-Ohmic Materials
Non-Ohmic Materials
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Henry Cavendish
Henry Cavendish
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Francis Ronalds
Francis Ronalds
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Georg Ohm
Georg Ohm
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Paul Drude
Paul Drude
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Study Notes
Ohm's Law
- Current is directly proportional to the electric field, as described by Ohm's law.
- Ohm's law is represented by the equation: V = IR, where V is voltage, I is current, and R is resistance.
- Resistance is constant under a given temperature and material conditions in the context of Ohm's law.
- Materials that do not obey Ohm’s law are referred to as non-ohmic materials.
The Drude Model
- The Drude model conceptualizes electrons as particles interacting elastically, akin to pinballs among ions.
- In this model, the average drift velocity of electrons is directly proportional to the electric field applied.
Historical Contributions to Electrical Theory
- In 1781, experiments using Leyden jars and glass tubes filled with salt solution to measure current were conducted by Luigi Galvani.
- In 1814, Alessandro Volta characterized 'intensity' (voltage) and 'quantity' (current) for the dry pile.
- Georg Simon Ohm published 'Die galvanische Kette, mathematisch bearbeitet' in 1827, contributing foundational knowledge to electrical circuit theory.
- The Drude model of electrical conduction was proposed by Paul Drude in 1900, marking a significant advancement in understanding electron behavior in materials.
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