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**Unformatted text preview: **motor is 0.20 hp. At a rate of $0.060/kWh, what is the cost of operating the motor for 4.0 hours? (1 hp = 735 . 49875 W) (a) 1.5 cents (b) 2.5 cents 1 (c) 3.5 cents (d) 5.0 cents (e) 6.5 cents 4. Find the values of I 1 , I 2 and I 3 for the circuit in the ±gure. (a) I 1 = 0 , I 2 = 0 . 5 A , I 3 = 0 . 5 A (b) I 1 = 0 . 5 A , I 2 = 1 . 0 A , I 3 = 1 . 5 A (c) I 1 =-. 5 A , I 2 = 1 . 0 A , I 3 = 0 . 5 A (d) I 1 = 0 . 5 A , I 2 =-1 . 0 A , I 3 =-. 5 A (e) I 1 = 0 . 5 A , I 2 =-. 5 A , I 3 = 0 5. Calculate the equivalent resistance of the cir-cuit in the ±gure. (a) 8 Ω (b) 10 Ω (c) 12 Ω (d) 14 Ω (e) 16 Ω 6. A series RC circuit has a time constant of 0.960 s. The battery has an emf of 48.0 V, and the maximum current in the circuit is 0.500 mA. What is the value of the capacitance? (a) 100 mF (b) 10 mF (c) 1 mF (d) 100 μ F (e) 10 μ F Good luck! 2...

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- Winter '09
- Berman
- Electrochemistry, Electron, Current, Electric charge, RC circuit, Prof. Dimitri Basov