1. Connecting resistors in series the resistance. 2. For series connections, Req = 3. Connecting resistors in parallel the resistance. 4. For parallel connections, Req = 5. Connecting capacitors in series the capacitance. 6. For series connections, Ceg =
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- 5. A car needs a battery with the following specifications (12V and 10 Amps). A flashlight battery has the following specifications (1.5 V & 0.5 Amp). If you plan to replace a car battery with flashlight batteries What is the minimum number of batteries required? How many of them will be in series and how many parallel (b ) Why are the capacitors assumed to be the major culprit in case of an electrical fire? What events can trigger this to happen2. For parallel circuits, you saw that the potential difference across each resistor was the same as the potential difference of the battery. Use your rule for potential difference in series circuits to explain why this would happen. Hint: Imagine following an electron as it leaves the battery, travels one of the paths through the circuit, and returns to the batter What is true about the changes in potential difference for the electron in each type of circuit? What would happen to the potential difference if you only had one resistor in series?4. In an ECG, if the potential between the Right and left arm leads is 0.8 mV, and the potential between left leg/left foot and left arm leads is 1.2 mV, what is the potential between right arm and left leg/left foot in mV?
- 5. Four resistors are connected to a battery as shown in the figure below. ww R₂=2R R₁ = R R₁=3R R₂ = 4R www (a) Determine the potential difference across each resistor in terms of . (b) Determine the current in each resistor in terms of I. (c) If R3 is increased, explain what happens to the current in each of the resistors. (d) In the limit that R3 →∞, what are the new values of the current in each resistor in terms of I, the original current in the battery?What is not a resistor? Check all that apply. a. Something that limits the flow of electrons b. Something that limits the voltage c. Something that robs energy from the system in terms of heat d. Something that produces a voltage drop across it5. What would the voltage be at the following times if the initial voltage is 8V, the resistance is 2 k and the capacitance is 50 uF. You At t=0 ms, V = Ov 8V (b) At t=100 ms, V=_S.SV At t=1000 ms, V= 8V V = Vu (1-22)-> (8)(1-eft) = uv -100 v = (8) 11-e (2000 (50x10²4)) -- S.USTV -1000103 +0₁) = 8.00 V= (8) (1-e 2000 (Saxiy 2 0