An automobile battery has an emf of 12.6 V and an internal resistance of 0.0540 2. The headlights together have an equivale resistance of 7.70 2 (assumed constant). (a) What is the potential difference across the headlight bulbs when they are the only load on the battery? (Enter you answer to at least two decimal places.) (b) What is the potential difference across the headlight bulbs when the starter motor is operated, with 35.0 A of curr in the motor? (Enter your answer to at least two decimal places.) V

Consider the following figure. (Assume V = 19.0 V, R₁ = 1.50 , and R₂ R₁ www V + 3.00 Ω ww 4.00 Ω -R₂ (a) Is it possible to reduce the circuit shown in the figure above to a single equivalent resistor connected across the battery? Explain. This answer has not been graded yet. (b) Find the current in the 1.50- resistor. A 6.00 2.) (c) Calculate the power delivered by the battery to the circuit. W

In the figure the ideal batteries have emfs &₁ = 18.8 V, &2 = 9.08 V, and 3 = 5.40 V, and the resistances are each 2.20 2. What are the (a) size and (b) direction (left or right) of current i₁? (c) Does battery 1 supply or absorb energy, and (d) what is its power? (e) Does battery 2 supply or absorb energy, and (f) what is its power? (g) Does battery 3 supply or absorb energy, and (h) what is its power? #H (a) Number i (b) (c) 1 & 3. (d) Number (e) (g) left i (f) Number i supply [ supply (h) Number i Units #1&₂ A Units W Units W Units W

A certain car battery with a 12.0 V emf has an initial charge of 136 A · h. Assuming that the potential across the terminals stays constant until the battery is completely discharged, for how many hours can it deliver energy at the rate of 130 W? _______________h (please show units when you work this out so that I can follow it easier.)

A battery with an emf of 7 V and an internal resistance of 0.5 Ω is connected to a variable resistance R. Find the current and power delivered by the battery when R has each of the following values. 1)R = 0 Ω, I= 2)P = 3)R = 5Ω, I = 4)P= 5)R = infinity, I =, P=

Please asnwer all parts of the one problem: Consider the three resistors R1 = 17 Ω, R2 = 41 Ω, and R3 = 71 Ω in the configuration shown in the figure. A potential difference ΔV = 4.5 V is applied between A and B. Part (a)  Calculate the numerical value of the total resistance R of this circuit, in ohms.  Part (b)  Calculate the numerical value of the current I traveling from A to B, in amperes.   Part (c)  Calculate the numerical value of I2 traveling through the resistor R2, in amperes.  Part (d)  Calculate the numerical value of I3 traveling through the resistor R3, in amperes.