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1. |
A 12 V battery with an internal resistance 0.5 ohms feeds a series circuit containing 20 ohms, 10 ohms, and R. Find the value of R if the current in the circuit is 0.2A. |
A. | 14.5 ohms |
B. | 29.5 ohms |
C. | 4.5 ohms |
D. | 5.5 ohms |
Answer» C. 4.5 ohms | |