EM 40 A model for circuits Part 3: Multiple batteries THAT eTIUPSHIS SION HCIOMA D. Use your observations thus far to devise a rule that relates the potential difference across a network of batteries in series with each other to the potential difference across each of the batteries. We can find Unit in a circuit. When I battery is connected to other battery with opposite polarity then their voltage and if connected with the same then soltape subtracted. age added E. Consider the circuit at right. 1. Predict whether the brightness of bulb 6 in circuit VI will be tion greater than, less than, or equal to that of bulb 5 in circuit V. Explain. V net = V+ V+ V-V= 20 HHIO Brightness will be greater than bulb 5 Ask a tutorial instructor for this circuit and check your prediction. Resolve any inconsistencies. Circuit VI 2. On the basis of your observations, how does the absolute value of the potential difference across bulb 6 in circuit VI compare to that across bulb 5 in circuit V? Explain Vcircuits > Veiraits mon . enidand of guibingos Ynet zommib ou Basingand 3. Is the absolute value of the potential difference across bulb 6 in circuit VI the same as that across any of the bulbs in the circuits in part B? If so, which bulb(s)? Explain. (Hint: Ask a tutorial instructor for any of these circuits if you would like to make additional observations.) yes in Bulb 3 circuit 111 Is your answer consistent with the rule you developed in part D? Explain your reasoning F. Review the prediction that you made in part A.de zonnighd sdo forhisilve moinsid i edlud self- To the to jadi es ambe 1. Do you still agree with your prediction? If not, revise it below. mislead ()diud 2. Predict whether the absolute value of the potential difference across bulb la in circuit I will be greater than, less than, or equal to that across a single battery. Explain. 3. Ask a tutorial instructor for circuit I and a voltmeter, then check your predictions. Resolve any inconsistencies. Tutorials in Introductory Physics, Physics Education Group, Department of Physics University of Washington (Summer 2022, Mazur version)EM A model for circuits Part 3: Multiple batteries 42 B. Suppose that a bulb, bulb 9b, were added to circuit VIII as shown. 1. Predict whether the brightness of bulb 9a in circuit IX will A 9a increase, decrease, or remain the same when the switch is New cl dl closed. Explain your reasoning. to ad reum eleniarist syitizod Well "how Horn of dlud azotion Circuit IX 2. Predict the ranking of the bulbs according to brightness, from american to dimmest, what the switch is closed. If any bulbs will have the same brightness of will not light, state ile explicitly. Explain your reasoning. onsibgig gri wolfor Visited herito ant mont banonshib mithisfog ant among of avant as bro " testrigind sift ed Ww of dlud . Obtain this circuit from a tutorial instructor so that you can check your predictions. The questions that follow will help you resolve any inconsistencies. 4. When the switch is closed, does the absolute value of the potential difference across bulb 9a increase, decrease, or remain the same? Explain how you can tell based on your observations in part 3. tionbo gook ofqiflum nuestrotied siquiom Is the absolute value of the potential difference across bulb 9a greater than, less than. or equal to that across battery A? Does your answer depend on whether the switch is open or closed? Explain your reasoning. 5. While the switch is closed, is the absolute value of the potential difference across the network of bulb 9b and battery B greater than, less than, or equal to that across battery A? Explain your reasoning. Assuming that batteries A and B are identical, is the absolute value of the potential difference across bulb 9b zero or non-zero while the switch is closed? Explain. Tutorials in Introductory Physics, Physics Education Gir University of WaA model for circuits Part 3: Multiple batteries EM Consider the following incorrect predictions about the behavior of the circuit 1. 41 Student 1 : "Bulbs la lbs la and 1b are in parallel branches. Since bulb la is connected to both a ss a he positive and a negative battery terminal, the left branch is a complete circuit and bulb la will light. The right branch isn't, so bulb 1b won't light." necked added Student 2: "I agree. Bulb 1b won't light because it is connected to two positive terminals. Since both positive terminals must be at the same potential, there's no potential difference across bulb 1b and it won't light." Identify the flaw(s) in each student's reasoning. Explain your reasoning. jemmib of 18sidand moll , ezonifigand of gniblogon poll edlud ordi to a H. Before setting up the circuit shown at right, a student makes the following prediction "Bulb 7a gets all of the potential difference of one battery, while bulbs 7 and 7c have to share the potential difference from the other battery. So, bulb 7a will be the brightest." 7c Do you agree or disagree with this prediction? Explain your reasoning. Circuit VII Ask a tutorial instructor to show you this circuit so that you can check your answer. Discuss your responses to parts G and H with a tutorial instructor. II. Multiple batteries in multiple-loop circuits A. Consider the circuit at right. 1. Predict whether the brightness of bulb 8 will increase, decrease, or remain the same when the switch is closed. ( 8 ) 00 Explain your reasoning. Circuit VIII Ask a tutorial instructor to show you this circuit so that you Ine de dled to showion can check your prediction. 2. On the basis of your observations, does the potential difference across bulb 8 change when the switch is closed? Explain your reasoning brin A ashanded isdi gnumpeed cunolog a nielgal Sbozolo at Holive aid slidw over-hon to oxos de dind seoros parisienlib 3. When the switch is closed, does the current through battery A increase, decrease, or remain the same? Explain your reasoning. (Hint: Before the switch is closed, which batteries can supply current to the bulb? What about after the switch is closed?) OTutorials in Introductory Physics, Physics Education Group, Department of Physics University of Washington (Summer 2022, Mazur version)