1.

When 30 V is applied to four series resistors, 60 μA flows. If R1 = 42 kΩ, R2 = 47 = kΩ, and R3 = 56 kΩ, what is the value of R4?

A. 35 kΩ
B. 3.55 kΩ
C. 355 kΩ
D. 500 kΩ
Answer» D. 500 kΩ


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