a. In the circuit shown in Figure Q23.8, bulbs A and B are glowing. Then the switch is closed. What happens to each bulb? Does it get brighter, stay the same, get dimmer, or go out? Explain. b. Figure Q23.9 shows two circuits. The two batteries are identical and the four resistors all have exactly the same resistance. a. Is _Vab larger than, smaller than, or equal to _Vcd ? Explain. b. Rank in order, from largest to smallest, the currents I1 , I2 , and I3 . Explain.
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