3. In the circuit shown in the figure, the battery has internal resistance r, the resistor R has a variable resistance. As R is decreased, what happens to the currents? p 12R₂ R₁ a. I remains unchanged and /2 increases. b. 1 decreases and 12 decreases. 1 decreases and 12 increases. d. 1 increases and 12 decreases. c. e. I increases and 12 increases.
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