In the accompanying figure, the rails, connecting end pieces, and rod all have a resistance per unit length of 4.5/cm. The rod moves to the left at v 3 m/s. If B=0.25 T everywhere in the region, what is the current in the circuit (a) when a = 6 cm? (b) when a = = 4 cm? = B Hint a. When a a = = 6 cm, a Select an answer circuit. b. When a = 4 cm, mA flows in the circuit. 4.0 cm current of mA flows in the

In the accompanying figure, the rails, connecting end pieces, and rod all have a resistance per unit length of 4.5/cm. The rod moves to the left at v 3 m/s. If B=0.25 T everywhere in the region, what is the current in the circuit (a) when a = 6 cm? (b) when a = = 4 cm? = B Hint a. When a a = = 6 cm, a Select an answer circuit. b. When a = 4 cm, mA flows in the circuit. 4.0 cm current of mA flows in the