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Practice Test
: Physics Vocab Ch. 34-35
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Current in series
When does flow of charge happen?
Generators
Total current in parallel
Source of electrons in a circuit
V = IR
Amperes
Measure electric current. 1 A = 1C / 1Sec
Divides among parallel branches. Ohm's law applies separately. Sum of currents in branches.
Potential Difference
= for all resistors
From material itself. Not from outlet or battery.
Ohm's Law. Voltage = Current x Resistance. 1 ampere = 1 volt / 1 ohm
Convert mechanical energy to electric energy
Short Answer
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Wet body and electricity
Short Circuit
Conduction Electrons
3 prong plugs
Internal resistance
Multiple Choice
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Fuses
Greater number of branches, less resistance.
Prevent overloading in circuits. Fuse explodes if wires overload, prevents fires
Rate at which electric energy converted into another form
1/2 the value of either resistor
Less the resistance
Circuit
From material itself. Not from outlet or battery.
Resistance inside battery
Complete path from the positive terminal to negative terminal
Measure electric current. 1 A = 1C / 1Sec
Convert mechanical energy to electric energy
Potential difference
Arrangements of 2 or more cells
dc. Flow of charge always in 1 direction. In batteries, terminals always same charge.
From material itself. Not from outlet or battery.
Rate at which electric energy converted into another form
Difference in voltage across the ends of a conductor
Total resistance in series
Sum of resistors. (Ohm's law applies to each device)
Potential Difference
Resistance less with wetness. Ions in water transfer energy more easily.
Dry cells, wet cells, generators
Electric Power = Current x Voltage. 1 watt = 1 ampere x 1 volt
Direct Current
dc. Flow of charge always in 1 direction. In batteries, terminals always same charge.
Unit of electric resistance
Potential Difference
Electrons that carry charge through a circuit
Branches where each is a separate path for flow of electrons
True or False
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In Parallel Circuit
Branches where each is a separate path for flow of electrons
True
False
Schematic diagrams
Symbols used to represent cerntain cicuit elements
True
False
Watts
Rate at which electric energy converted into another form
True
False
Birds on high voltage wires
No effects because no voltage difference. Touch nothing else of different voltage.
True
False
Electric power
Rate at which electric energy converted into another form
True
False
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Practice Test: Physics Vocab Ch. 34-35