Deck 7: Parallel Circuits
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Deck 7: Parallel Circuits
1
A method for finding total resistance of parallel resistors is _____.
A) product over sum
B) reciprocal formula
C) resistors of equal value
D) all of the above
A) product over sum
B) reciprocal formula
C) resistors of equal value
D) all of the above
D
2
The term "load" refers to the amount of _____ in a circuit branch.
A) current
B) resistance
C) voltage
D) wattage
A) current
B) resistance
C) voltage
D) wattage
A
3
An increase in _____, not resistance, results in an increase of load.
A) power
B) current
C) voltage
D) wattage
A) power
B) current
C) voltage
D) wattage
B
4
Most devices such as light receptacles in homes and office buildings are connected in _______________ circuits.
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5
A parallel circuit is composed of two 60 Ω resistors. What is the total resistance?
A) 1 Ω
B) 3600 Ω
C) 120 Ω
D) 30 Ω
A) 1 Ω
B) 3600 Ω
C) 120 Ω
D) 30 Ω
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6
A three branch parallel circuit has resistors of 27 Ω , 56 Ω , and 15 Ω . What is the total resistance?
A) 9.64 Ω
B) 98 Ω
C) 18.22 Ω
D) 8.23 Ω
A) 9.64 Ω
B) 98 Ω
C) 18.22 Ω
D) 8.23 Ω
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7
To calculate current flow through any branch of a circuit by substituting the values of IX and RX for the branch values when total circuit current and the resistance are known, use t he _______________ formula.
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8
Circuits that have more than one path for current flow are _____ circuits.
A) parallel
B) series
C) combination
A) parallel
B) series
C) combination
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9
A two-branch parallel circuit has a 30 Ω and a 15 Ω resistor. What is the total resistance?
A) 2 Ω
B) 10 Ω
C) 45 Ω
D) 15 Ω
A) 2 Ω
B) 10 Ω
C) 45 Ω
D) 15 Ω
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10
In a parallel circuit, the total current flow is equal to the _____ of the currents through all the branches.
A) difference
B) average
C) sum
D) quotient
A) difference
B) average
C) sum
D) quotient
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11
Imagine a water system with a holding tank, pump, and return lines. What would happen to the resistance to flow if a return path is added to the system?
A) It increases
B) It lessens
C) It stays the same
A) It increases
B) It lessens
C) It stays the same
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12
The voltage drop across any branch of a parallel circuit is the same as _______________ voltage.
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13
In a parallel circuit, the total resistance is _____ value resistor.
A) larger than the lowest
B) less than the lowest
C) equal to the largest
D) equal to the lowest
A) larger than the lowest
B) less than the lowest
C) equal to the largest
D) equal to the lowest
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14
A parallel circuit composed of a 10 Ω and a 22 Ω resistor. It has a voltage of 60 V. What is the current in the 10 Ω resistor?
A) 6 A
B) 5 A
C) 2.73 A
D) 1.88 A
A) 6 A
B) 5 A
C) 2.73 A
D) 1.88 A
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15
A three-branch parallel circuit has a total resistance of 385.83 Ω . Two of the resistors are 680 Ω and 1500 Ω . What is the value of the third resistor?
A) 2180 Ω
B) 2200 Ω
C) 467.89 Ω
D) 246.16 Ω
A) 2180 Ω
B) 2200 Ω
C) 467.89 Ω
D) 246.16 Ω
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16
Parallel circuits are also referred to as _____.
A) current dividers
B) current multipliers
C) voltage dividers
D) voltage multipliers
A) current dividers
B) current multipliers
C) voltage dividers
D) voltage multipliers
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17
A parallel circuit composed of a 150 Ω and a 270 Ω resistor has a voltage of 120 V. What is the current in the 150 Ω resistor?
A) 0.29 A
B) 0.8 A
C) 1 A
D) 0.44 A
A) 0.29 A
B) 0.8 A
C) 1 A
D) 0.44 A
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18
The amount of current flowing through each resistor is directly proportional to its resistance.
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19
In a parallel circuit, the voltage across each branch must be _______________.
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