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25 Cards in this Set
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Is a constant of proportionality that exists between electric displacement and electric field intensity in a given medium. |
Permittivity |
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is defined as the total amount of energy in a system per unit volume |
Energy Density |
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is an electrical insulator that can be polarized by an applied electric field. |
Dielectric |
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Electric charges slightly shift from their average equilibrium positions, causing |
dielectric polarization |
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to keep the conducting plates from coming in contact, allowing for smaller plate separations and therefore higher capacitance |
Dielectric |
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to increase the effective capacitance by reducing the electric field strength, which means you get the same charge at a lower voltage |
Dielectric |
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to reduce the possibility of shorting out by sparking (more formally known as dielectric breakdown) during operation at high voltage |
Dielectric |
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the rate at which an object changes its position |
Velocity |
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the rate at which an object changes its velocity |
Acceleration |
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the rate at which work is done on an object |
Power |
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is a physical quantity that can be measured and expressed numerically, it is the rate at which charge flows past a point on a circuit |
Current |
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Has to do with the number of coulombs of charge that pass a point in the circuit per unit of time. |
Current |
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typical drift speed might be1 meter per hour. |
Important |
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tend to INCREASE their resistance with an increase in temperature |
Conductors |
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however are liable to DECREASE their resistance with an increase in temperature |
INSULATORS |
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is the electrical resistance of a conducting material per unit length. |
Resistivity |
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by contrast, is the degree to which a conductor allows the flow of electricity through itself. |
Conductivity |
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Is a ratio of the current density to the electric field strength |
Electrical conductivity |
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was the one who first chose to call electrons negative and protons positive. |
Benjamin Franklin |
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Electrons flow from the negative terminal to the positive. |
Important |
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states that the greater the potential difference placed across the device, the greater the resulting current |
Ohm's Law |
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refers to is the rate at which electrical energy is converted to heat |
Ohm's law |
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It is the amount of energy supply to one coulomb of charge. It transmits current throughout the circuit. Greater than the potential difference between any two points Causes in magnetic, gravitational and electric field. |
Electromotive Force |
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The amount of energy used by one coulomb of charge in moving from one point to another It transmits current between any two points. Always less than the maximum value of emf when the battery is fully charged Induces only in electric field |
Potential Difference |
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"Physics for Scientists and Engineers" By? Franklin, identified electric charge carriers after a series of rubbing experiments. |
Raymond A. Serway, |
