Like charges repel each other; unlike charges attract.
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electric field
a region of space where a small positive test charge experiences a force due to its charge
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electric field strength
force per unit charge experienced by a positive test charge placed in the field
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Moving charge
the amount of charge that passes a fixed point in a given period of time
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current
flow of electric charge
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potential difference
the work done by moving a positive test charge from one point to another in an electric field
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electron-volt
the energy required to accelerate an electron across a potential difference of 1 volt
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Internal resistance
Resistance of the cell. As current flows through internal resistance, some energy is converted from electrical to heat inside the cell.
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resistance
Rate at which charge can flow through a conductor
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emf
Amount of chemical energy converted to electrical energy, per unit charge.
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ohmic and non ohmic behavior
Ohmic conductor obeys the Ohm's Law (V=IR), which means that the potential difference is proportional to current. Non-ohmic conductor doesn't obey Ohm's Law.
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parallel resistors
1/r = 1/r1 + 1/r2
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in series resistors
r = r1 +r2
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voltmeter connected in
parallel
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ammeter connected in
series
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secondary cell
can be recharged after use by passing current through the circuit in opposite direction to the current during discharge
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Flashcard (20)