Exercise: Parallel Circuits

Questions for: Parallel Circuits

There is a total of 800 mA of current into four parallel resistors. The currents through three of the resistors are 40 mA, 70 mA, and 200 mA. The current through the fourth resistor is
A:
490 mA
B:
800 mA
C:
310 mA
D:
0 A
Answer: A
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Three 47 resistors are connected in parallel across a 110 volt source. The current drawn from the source is approximately
A:
2.3 A
B:
780 mA
C:
47 mA
D:
7.06 A
Answer: D
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The following resistors are in parallel across a voltage source: 220 , 470 , and 560 . The resistor with the least current is
A:
220
B:
470
C:
560
D:
impossible to determine without knowing the voltage
Answer: C
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The following currents are measured in the same direction in a three-branch parallel circuit: 200 mA, 340 mA, and 700 mA. The value of the current into the junction of these branches is
A:
200 mA
B:
540 mA
C:
1.24 A
D:
900 mA
Answer: C
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A sudden increase in the total current into a parallel circuit may indicate
A:
a drop in source voltage
B:
an open resistor
C:
an increase in source voltage
D:
either a drop in source voltage or an open resistor
Answer: C
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