Flashcards in Conceptual Physics-Electricity Unit- Quiz 2 (Ohm's Law) Deck (20):
1
Voltage
energy used to move electrons (energy per charge); the "push"; can be used to run devices; symbol V
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Voltage is measured in...
volts; symbol V
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Current
flow of charges (electrons) through conductors; speed of charges; amount of charges going past a point in one second; symbol I
4
Current is measured in...
Amperes or Amps; symbol A
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Resistance
opposition of a material to the flow of charges; a resistor is something that slows down current; symbol R
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Resistance is measured in...
Ohms; symbol Omega:
Ω
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The relationship between Current and Resistance...
is an inverse relationship- if one goes up, the other goes down, and vice versa. (considering Voltage is constant)
8
The relationship between Current and Voltage...
is a direct relationship- if one goes up, so does the other, and vice versa. (considering Resistance is constant).
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How is a voltmeter wired into a circuit?
in parallel
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How is an ammeter wired into a circuit?
in series
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Ohm's Law
describes the relationship among voltage, current, and resistance;
Mainly V=IR or Voltage is equal to Current times Resistance
Also: I=V/R and R=V/I
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What are the differences between Parallel and Series circuits?
In series, Resistances add; In parallel, Resistances are multiplied and then divided by their sum
In Series, voltage adds; in parallel, Voltage doesn't ?
In series, there is only one path; In parallel, there are multiple paths
In series, adding devices slows the current (if the voltage is constant), and they dim consecutively; In parallel, the current remains constant in all the bulbs.
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CirSym:
Conductor or Wire
line
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CirSym:
Connection
dot on line
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CirSym:
Bulb
line going up into an "M" shape within a circle
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CirSym:
One cell or battery
line ending in a short perpendicular dash, then a gap, then a longer perpendicular dash, then the line continues. For multiple batteries, add short and long dashes with gaps then continue line.
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CirSym:
Switch
Open: line with a connection on the end, then a tilted line only connected to the other side (with a connection)
Closed: line with two consecutive connections
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CirSym:
Resistor
3 Zig Zags: above line, below, all the way above, all the way below, all the way above, then back down to original level of wire and continue line
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CirSym:
Ammeter, Voltmeter, Generator
A, V, or G within circle on wire
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