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15 Cards in this Set
- Front
- Back
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How many amperes of current will flow in a circuit containing a 2 V battery and 10 ohms of resistance?
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0.2 amperes
current is unknown: I= E/R E=2; R= 10 I=2/10 I=0.2 amperes |
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Define atom.
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An atom is the smallest piece of an element.
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Define electron.
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Am electron is elementary particles with a negative charge
that orbits the nucleus of an atom. |
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Define proton.
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A proton is an elementary particle with a positive charge in the central nucleus of an atom.
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When is an atom stable or in equilibrium?
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when the numbers of protons equals the number of electronss
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Coulombs Law states ______.
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like charges repel: unlike (opposite) charges attract
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When an atom has lost or gained one or more electrons it is considered an ________.
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ion
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Define current (I)
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Current os the movementof electrons through a conductor. The unit of current is the ampere (A),
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Define resistance (R).
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Resistance is the opposition to the direct current flow. The unit of resistance is the ohm ( ).
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Define impedance.
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Impedance represent st he combined efects of resistance, capacitive reactance, and inductive reactance that occur in AC currents.
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Define capacitance.
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Capacitance is the ability to store a charge. Capacitors block direct current but pass alternating current. The unit of capacitance is the farad.
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Define inductance.
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Inductance is the property a circuit possesses that causes a voltage to be induced in the circuit when there is a variation in current. Inductance opposes any change in current. The unit for inductance is the henry.
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Define alternating current.
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Alternating current flows in one direction and then reverses itself. It is the most common source of power to operate equipment.
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What does a voltmeter measure?
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voltage
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What does an ohmmeter measure?
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resistance
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