Physics-P4: Electric Circuits
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29 Terms
1
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What is the unit for current?
Amps (A)
2
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What is the unit for charge?
Coulombs (C)
3
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What is the unit for time?
Seconds (S)
4
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What is the unit for voltage?
Volts (V)
5
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What is the unit for energy?
Joules (J)
6
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What is the unit for resistance?
Ohms
7
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Voltage
Energy transferred per unit of charge
8
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Resistance
The effect that reduces a current
9
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Current
Flow of electrons
10
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How does a wire length affect resistance?
Longer wire increases resistance because the wire will be stronger
11
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How is resistance affected by circuits being in series or parallel?
A series circuit has a higher resistance because all electricity is passing through both resistors
12
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What is the relationship between a thermistor and temperature?
A thermistor changes resistance based on temperature, higher temperature=lower resistance
13
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What is the relationship between the resistance of an LDR and light intensity?
The more intense the light, the higher the resistance
14
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How does current change between a series and parallel circuit?
In series circuits current does not change, in parallel the current is the strongest at the top of the circuit however it lowers when it branches off.
15
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Why do adding resistors in series increase the total resistance whilst adding resistors in parallel decreases total resistance?
In series circuits resistors reduce the flow of electrons, increasing resistance, however if you add a resistor in parallel it adds an alternative pathway, increasing the current and decreasing the resistance.
16
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What circuit symbol is this?
Open switch
17
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What circuit symbol is this?
Closed switch
18
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What circuit symbol is this?
Cell
19
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What circuit symbol is this?
Battery
20
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What circuit symbol is this?
Diode
21
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What circuit symbol is this?
Ressistor
22
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What circuit symbol is this?
Variable Ressistor
23
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What circuit symbol is this?
LED
24
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What circuit symbol is this?
Lamp
25
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What circuit symbol is this?
Fuse
26
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What circuit symbol is this?
Voltmeter
27
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What circuit symbol is this?
Ammeter
28
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What circuit symbol is this?
Thermistor
29
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What circuit symbol is this?
LDR
Note 
Flashcards (42)