You are given two circuits with two batteries of emf E and internal resistance R1 each. Circuit A has the batteries connected in series with a resistor of resistance R2, and circuit B has the batteries connected in parallel to an equivalent resistor.
(I) Calculate the current IB through the resistor of resistance R2 for circuit B. Express your answer in terms of E, R1, and R2.
(2) What is the power dissipated by the resistor of resistance R2 for circuit A, given that E=10 V, R1=300ohms, and R2=5000ohms? Calculate the power to two significant figures.
(3) For what ratio of R1 and R2 would power dissipated by the resistor of resistance R2 be the same for circuit A and circuit B?
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