Dirac fermion heating, current scaling, and direct insulator
Current conductor insulator
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Current, Conductors and Insulators Electrical!
description
Transcript of Current conductor insulator
Current, Conductors and Insulators
Electrical!
Source of Electricity
Measured in volts.Possible sources of electricity:
Current
Electrical current is produced when electrons move from atom to atom through a material. Current is measured in amperes (A) or amps for short and one ampere is equal to 1 coulomb of charge (6.25x1018 electrons) moving past a given point in 1 second.
Analogy to help you rememberGarden Hose
The voltage, or the force, causing the electrical current to flow is similar to the water pressure from the water tap. When the tap is opened the water pressure increases and the amount of water flow will also increase.
Similarly the amount of electrical current will increase if the voltage is increased. If the tap is closed there will be no water flow and the same is true for electrical current – if there is no power source there will be no current.
Direct Current (DC)
• One direction• Batteries
Alternating Current (AC)
• Switches direction (back and forth)• From generation stations to houses
Lab Activity • Make a current tester (power source, bulb,
wire)• Test materials provided – zinc, desk, water in
beaker, oil, soil, wire, pencil, etc.
Material Did it make light bulb go on?
Notes
Zinc
Desk
Follow-Up Questions
1. Define conductor and insulator2. Which of the materials you tested were
conductors? How do you know?3. Which of the materials you tested were
insulators? How do you know?4. What type of materials are conductors (in
general)? 5. What is a semi-conductor? What is one
application of a semi-conductor in real life?
