15. In the circuit shown in Fig. the resistor 6.0 is consuming energy at a rate of 24 J/s when the current through it flows as shown. (a) Find the current through the ammeter A. (b) What are the polarity and emf of the battery, assuming it has negligible internal resistance ? E = ? 17 Ω 25 V- www 1302 20.00 [x] 6.00 20.00 3.00 www 1.00 190

a) 339 2 b) 5.6 k2 C) 560 Ω d) 260 ΚΩ 16. 2A current passes through a resistor of 60 2 when a battery is connected across this resistor. The voltage across the resistor is a) 120V b) 220V c)15 V D) 30V 17. You have 2 dry cells of 1.5 V each. You connected in series and then to a resistor of 12 to make a closed circuit. The magnitude of current is a) 3x10-3A b) 3A c) 3×10°A d) 1.5A 18. A parallel plate capacitor is connected to a battery of 12V. The capacitor is fully charged and has a charge of 120 C. The capacitance of the capacitor is 1 10 English (United States) OFocus 312% Page 4 of 7 1286 words MacBook Air 4) F9 F10 F1 F12 esc O00 EA F8 F2 F3 F1 % & * 2$ 4 @ # %3D delete 3 6 7 8 9

Do this: For each item, Find the (a) equivalent resistance of the combined resistors, (b) current flowing through each resistor, and (c) voltage |drop across each resistor. 1. Four resistors with values 3.00, 4.0N, 5.00, and 6.00, respectively, are connected in series to a 12 V source. 2. Five resistors, Rq = 5.00 , R2 = 10.00, R3 = 15.00, R4 = 12.00, and R5 = 15.00, are connected in combination to a 120 V source. R2 R3 R5

ww 24 0 Questions 3 & 4 refer to the circuit shown in the figure. The battery emf is 12 V. ww ww ww 12 0 3. What is the power dissipated by the 8 N resistor? [Hint: don't make this more work that you have to.] А. 4.5 W В. 6.0 W C. 8.0 W D. 18 W 3. 4. What is the current through the battery? [Hint: now you really do have to do all that work!] А. 0.50 A В. 1.5 А С. 3.0 А D. 6.0 A 4.