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Duplicate of POE Electric Circuits Flashcards | StudBud
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Duplicate of POE Electric Circuits
Duplicate of POE Electric Circuits
20 terms
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electric circuits ohm's laws #physics #electricty
Flashcards
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Questions
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Answers
1
Current is defined as...
Instrument that measures properties of an electrical circuit
The steady flow of electric charges
Movement of electrons
The pressure that causes electricity to flow
2
An equation for Ohm's Law is...
V=R/I
I=V/R
I=VR
V=IR
3
What does the letter I stand for in the ohm's law equations?
watts
amps
volts
ohms
4
What is the total current if the total voltage = 300 volts, R1=R2=R3=30ohms
30 amps
40 amps
10 amps
20 amps
5
Voltage is defined as:
The amount of flow of current in an object
Directly proportional to resistance
A potential energy which makes electrons move
A force that causes electrons to flow
6
What is the total Resistance when each R = 16 ohms (2 simplifying steps)
64 ohms
16 ohms
32 ohms
8 ohms
7
Kirchhoff's Voltage Law states
Voltage from a battery is always constant
Sum of all the currents through each component is the same
Sum of the V drops in a loop is equivalent to Vtotal.
Sum of all voltage drops (in series circuit) = total voltage
8
What is the total resistance when each R = 20 ohms (2 simplifying steps)
30 ohms
100 ohms
60 ohms
15 ohms
9
What does the letter V stand for in the Ohm's Law equations?
Current
Power
Potential Difference
Energy
10
What does the ammeter measure in an electrical circuit?
Current
Resistance
Power
Energy
11
The voltmeter is measuring the _______ difference across the ________.
current; resistor
voltage; fuse
voltage; battery
voltage; resistor
12
The ammeter is measuring the _______ through the ________.
voltage; resistor
current; fuse
current; circuit
voltage; circuit
13
In a parallel circuit
The total voltage is the sum of the voltage is each branch
Current is the same throughout the system
Voltage is = in each branch and is = to the source voltage
Current is equal in each branch and is = to total current
14
What is the total current if the battery is = 180 volts, and total resistance = 60 ohms
4 amps
3 amps
2 amps
1 amp
15
Kirchhoff's Current Law states...
Sum of all voltage drops (series circuit) = total voltage
Current entering a junction must = the current leaving it
Electricity is created as electrons collide atom to atom.
Total current in a parallel circuit = sum of branch currents
16
What is the total resistance if each R = 20 ohms ?
40
20
20 / 3
60
17
How much current is moving through the third resistor, when V
T
= 300 V, and R1 = R2 = R3 = 10 Ω
10 amps
30 amps
20 amps
5 amps
18
Convert .015 A to mA
150 mA
15 mA
1.5 mA
.0000015 mA
19
In a series circuit...
RT is equal to the reciprocal of the sum of the reciprocal
Voltage is the same throughout the system
A circuit that contains more than one path for current flow
Current is the same throughout the system
20
What is the total resistance if each R = 30 ohms?
10
90
30
60
