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11 Cards in this Set
- Front
- Back
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voltage |
the energy carried around a circuit by electric charges. The measurement in volts is the amount of energy in Joules transferred to, or from, a Coulomb of electrical charge. E.g. energy transferred from a battery to the charges, or from the charges to a load such as a bulb or resistor. |
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electrical potential energy |
the type of energy stored by electrical charges. |
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charge |
a positive or negative particle. They experience a force on them when they are placed in an electric or magnetic field. |
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current |
the flow of electric charges around a circuit. The measurement in Amperes is the number of Coulombs of charge passing any given point in a circuit in one second. |
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conventional current |
used to describe the direction that positive charges would flow in a circuit. Opposite to the way that electrons flow, as electrons have a negative charge. |
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power |
the rate of transfer of electrical energy. The measurement in Watts is the amount of energy in Joules transferred to or from one Coulomb of charge in one second. |
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charged particles |
In physics, a charged particle is a particle with an electric charge. It may be an ion, such as a molecule or atom with a surplus or deficit ofelectrons relative to protons. It can be the electrons and protons themselves, as well as other elementary particles, like positrons. It may also be anatomic nucleus devoid of electrons, such as an alpha particle, a helium nucleus. Neutrons have no charge, so they are not charged particles unless they are part of a positively charged nucleus. Plasmas are a collection of charged particles, atomic nuclei and separated electrons, but can also be a gas containing a significant proportion of charged particles. Plasma is called the fourth state of matter because its properties are quite different fromsolids, liquids and gases. |
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Series |
a circuit (or a section of a circuit) where there is only one pathway for the current to flow. |
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Parallel |
a circuit (or section of a circuit) where there are 2 or more different pathways that a current could flow. |
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resistance |
a measure of how difficult it is for current to flow through a component in an electrical circuit. Resistance is equal to voltage divided by current. |
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Ohm's Law |
links together voltage (V), current (I) and resistance (R). V= IR |
