Exercise: Parallel Circuits

Questions for: Parallel Circuits

The sum of the currents into a junction is equal to the sum of the currents out of that junction.
A:
True
B:
False
C:
D:
Answer: A
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In a five-branch parallel circuit, there are 12 mA of current in each branch. If one of the branches opens, the current in each of the other four branches is
A:
48 mA
B:
12 mA
C:
0 A
D:
3 mA
Answer: B
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Six resistors are in parallel. The two lowest-value resistors are both 1.2 k. The total resistance
A:
is less than 6 k
B:
is greater than 1.2 k
C:
is less than 1.2 k
D:
is less than 600
Answer: D
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If one of the resistors in a parallel circuit is removed, the total resistance
A:
decreases
B:
increases
C:
remains the same
D:
doubles
Answer: B
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Four resistors are connected in parallel. Fifteen mA flows through resistor R. If the second resistor is 2R, the third resistor 3R, and the fourth resistor 4R, the total current in the circuit is
A:
60 mA
B:
15 mA
C:
135 mA
D:
31.25 mA
Answer: D
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