21. A 12 kΩ resistor, a 15 kΩ resistor, and a 22 kΩ resistor are in series with two 10 kΩ resistors that are in parallel. The source voltage is 75 V. Current through the 15 kΩ resistor is approximately ________.
(a) 14 mA
(b) 1.4 mA
(c) 5 mA
(d) 50 mA
22. Three 10 kΩ resistors are connected in series. A 20 kΩ resistor is connected in parallel across one of the 10 kΩ resistors. The voltage source is 24 V. The total current in the circuit is ________.
(a) 900 μA
(b) 9 mA
(c) 90 mA
(d) 800 μA
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