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


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