Engineering Board Exam Reviewer · Series Circuits · medium
The circuit shown has V=100 V and R2=24 k . The ammeter reads 4 mA. Find the unknown resistance Rx.
- 25 k
- 1 k
- 49 k
- 2 k
Answer
B. 1 k
Solution
Total resistance: RT=V/I= 100 V4 mA=25 k . The known resistors total 24 k , so Rx=RT-24 k =1 k .
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