Electrical Engineering - Parallel Circuits

Exercise :: Parallel Circuits - General Questions

21. 

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: Option A

Explanation:

No answer description available for this question. Let us discuss.

22. 

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: Option D

Explanation:

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23. 

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: Option B

Explanation:

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24. 

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: Option D

Explanation:

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25. 

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: Option B

Explanation:

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