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electriciy&magnetism
Flash cards over Electricity and magnetism
| Term | Definition |
|---|---|
| Electrostatic force | The attraction or repulsion between stationary charged particles. ( it is a non-contact force) |
| Coulomb’s law: Part 1 -Direct Proportion to change magnitude | The magnitude of the electrostatic force is proportional to the products of the magnitudes of the two charges. |
| Coulomb's law: Part 2 - inverse square law of distance | The force is inversely proportional to the square of the distance between the centers of the two charges. |
| Coulomb's law: Part 3 - Action Along the Line/Direction | The force is repulsive for like charges and attractive for opposite charges. |
| Electric field | A vector field surrounding electric charges that exerts force on other charges. |
| Electric field lines point in the direction that . . . | A positive test charge would accelerate or move if placed within the field. |
| electricity | The flow of electrical power or charge. |
| conductor | A material or device that conducts or transmits heat, electricity, or sound. |
| examples of conductors | Lightning rod, electrical wires, metal pipes. |
| insulator | A substance which does not readily allow heat or sound pass. |
| examples of insulators | Rubber, plastics, glass, wood. |
| resistivity | An intrinsic material property measuring how strongly it opposes electrical current flow. |
| semiconductors | Somewhere between a conductor and an insulator. |
| superconductors | Materials that conduct electricity with zero resistance. |
| critical temperature | The highest temperature at which a substance can exist as a liquid. |
| Static electricity | The buildup of electrical charges on the surface of insulating materials caused by the transfer of electrons. |
| friction | The force opposing relative motion between two surfaces in contact. |
| induction | Producing an electrical or magnetic effect in a conductor by bringing it near a magnetic or charged object. |
| conduction | Heat or electricity is directly transmitted through a substance when there is a difference of temperature or of electrical potential between adjoining regions. |
| current electricity | The flow of electricity in an electronic circuit. |
| current | The net rate at which electric charge flows through a surface. |
| amperes | The SI base unit of electrical current. |
| resistance (R) | The opposition to a force, action, or flow. |
| voltage (V) | The electric potential difference that drives electric charge through a conductor. Measured in volts. |
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