A 22- and a 30- resistors are connected in parallel, and the combination is conn

Question

A 22- and a 30- resistors are connected in parallel, and the combination is connected across a 240-V dc line.

A. What is the resistance of the parallel combination? Express your answer with the appropriate units.

B. What is the total current through the parallel combination?Express your answer with the appropriate units.

C. What is the current through the 22-resistor?Express your answer with the appropriate units.

D. What is the current through the 30-resistor?Express your answer with the appropriate units.

Explanation / Answer

a ) The resistance of the parallel combination

= 1 / ( 1/22 + 1/30)

Requ = 12.69 ohms

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b) The total current through the parallel combination

= V / Requ = 240 / 12.69

= 18.91 A

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c) The current through 22 ohms resistor = 240 / 22

= 10.91 A

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d) The current through 30 ohms resistor = 240 / 30

= 8.0 A

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