As an auto mechanic, you need to determine the emf and internal resistance of an old battery. You perform two measurements. In the first, you apply a voltmeter to the battery's terminals and read 11.8 V.11.8 V. In the second, an ammeter applied to the terminals indicates 19.5 A.19.5 A. What are the battery's emf and internal resistance?

6. Consider the combination of resistors shown in Figure P18.6. (a) Find the equivalent resistance between point a and b. (b) If a voltage of 35.0 V is applied between points a and b, find the current in each resistor. 1 12.0 N 4.00 N a 5.00 N 6.00 N 8.00 N Figure P18.6

The circuit below contains two real batteries, each having significant internal resistance. Battery #1 has an EMF of 6.00 V and an internal resistance of 1.00 ohm. Battery #2 has an EMF of 12.00 V and an internal resistance of 2.00 ohms. These two batteries are connected in series with two resistors R, = 6.00 ohms and R,= 3.00 ohms. ri d (6.00,V) (1.00 0) R1 (6.00 N) R2 (3.00 N) a r2 E2 (2.00 Q) (12.00 V) 18. The current in the 12.00 Volt battery is equal to C. 0.500 A. A. 0.750 A. B. 1.00 A. D. 2.00 A. E. 1.50 A. 19. The potential difference across the terminals of battery #1 from point C to point d is equal to C. 7.00 V. A. 5.50 V. B. 6.00 V. D. 5.00 V. E. 6.50 V. 20. The potential difference across the terminals of battery #2 from point a to point b is equal to C. 13.00 V. A. 14.00 V. В. 10.00 V. D. 11.0 V. E. 12.00 V.

F₁ = L1, B₂ чт вът Різі чом =1032 V R -Gv 100 qüdrh I 1 R2 R23 2. Four resistors and a 6.0-V battery are arranged as shown in the circuit diagram. Find the equivalent resistance of the circuit b. Find the current through the 10-Ohm resistor a. sonsufit c. Find the power delivered to the 10-Ohm resistor R₁-4092 -18V -18V 13 C+ D B=6V 6VI Azov I=I1 + 0.64 AQUOS to 218-12 = 30 I H = -1 R4-2002 14. 0.64 1₂V R₂-3002 -IA F 12V E R3=1092 holong s vivang to 6 DS sailwaqogani THOS T20 3. A horizontal wire of length 6.0m carries a current of 6.0A and is oriented so that Forth's magnetic field is due north at this

a) From the graph, determine the emf (ϵϵ) of the battery. b) From the graph, determine the internal resistance (r) of the battery.

In the circuit in the figure below, the batteries have negligible internal resistance. (Take R, = 2.55 N, R2 = 4.15 N, and R3 = 5.70 n.) R2 R1 12.0 V= R 12.0 V b (a) Find the magnitude of the current in each resistor. I2.550 = A I4.150 = A. I5.700 = A (b) Find the magnitude of the potential difference between points a and b. V (c) Find the power supplied by each battery. left battery right battery

(a) Find the equivalent resistance of the circuit in Figure P18.8. (R1 = 4.00 2, R2 = 15.0 2) (b) If the total power supplied to the circuit is 2.00 W, find the emf of the battery. R2 4.00 2 5.00 N R, R, Figure P18.8

For the circuit shown in the drawing l₁ = 3.5 A and R₁ = 12 2 and battery voltage V₁ = 55 V. Determine the Current /passing through the 6.000 resistor. R₁ www 1₁ 6.00 Ω #H V₁ O 2 A 3 A 24.0 V 3.66 A 5.5 A 6 A #H 10 A I www 2.00 Ω 3.5 A 4.5 A

The figure below shows a battery connected to a circuit. The potential difference across the battery and the resistance of each resistor is given in the figure. 25.0 V 14.5 ΩΣ b 14.5 ΩΣ a 6.00 Ω - 6.00 Ω - 20.0 Ω Ⓡ (a) What is the magnitude of the potential difference (in V) between points a and b in the circuit? V (b) What is the current (in A) in the 20.0 2 resistor?