In order to perform an experiment on electric circuits, a student has to use a 6-ohm resistor, but finds that the laboratory already ran out of 6-ohm resistors. They find a large amount of 9-ohm resistors though. What should they do to get exactly 6 ohms? 1. Take nine 9-ohm resistors. 2. Connect three 9-ohm resistors in series. 3. Connect this series connection and all the remaining six in parallel. 1. Take four 9-ohm resistors. 2. Connect two of the four 9-ohm resistors in parallel. 3. Connect the parallel combination in series with the third 9-ohm resistor. 4. Connect the series connection in parallel with the last 9-ohm resistor. O The answer cannot be found on the other choices. 1. Take six 9-ohm resistors. 2. Connect three 9-ohm resistors in parallel and do the same for the remaining three. 3. Connect the two parallel combinations in series. 00

In order to perform an experiment on electric circuits, a student has to use a 6-ohm resistor, but finds that the laboratory already ran out of 6-ohm resistors. They find a large amount of 9-ohm resistors though. What should they do to get exactly 6 ohms? 1. Take nine 9-ohm resistors. 2. Connect three 9-ohm resistors in series. 3. Connect this series connection and all the remaining six in parallel. 1. Take four 9-ohm resistors. 2. Connect two of the four 9-ohm resistors in parallel. 3. Connect the parallel combination in series with the third 9-ohm resistor. 4. Connect the series connection in parallel with the last 9-ohm resistor. O The answer cannot be found on the other choices. 1. Take six 9-ohm resistors. 2. Connect three 9-ohm resistors in parallel and do the same for the remaining three. 3. Connect the two parallel combinations in series. 00

Physics for Scientists and Engineers with Modern Physics

10th Edition

ISBN:9781337553292

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter27: Direct-current Circuits

Section: Chapter Questions

Problem 34AP: The circuit in Figure P27.34a consists of three resistors and one battery with no internal...

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A homemade capacitor is constructed of 2 sheets of aluminum foil with an area of 2.00 square meters, separated by paper, 0.05 mm thick, of the same area and a dielectric constant of 3.7. The homemade capacitor is connected in series with a 100,00- resistor, a switch, and a 6.00-V voltage source, (a) What is the RC time constant of the circuit? (b) What is the initial current through the circuit, when the switch is closed? (c) How long does it take the current to reach one third of its initial value?
Consider the circuits shown below, (a) What is the current through each resistor in part (a)? (b) What is the current through each resistor in part (b)? (c) What is the power dissipated or consumed by each circuit? (d) What is the power supplied to each circuit?
The circuit in Figure P27.34a consists of three resistors and one battery with no internal resistance. (a) Find the current in the 5.00- resistor. (b) Find the power delivered to the 5.00- resistor. (c) In each of the circuits in Figures P27.34b, P27.34c, and P27.34d, an additional 15.0-V battery has been inserted into the circuit. Which diagram or diagrams represent a circuit that requires the use of Kirchhoffs rules to find the currents? Explain why. (d) In which of these three new circuits is the smallest amount of power delivered to the 10.0- resistor? (You need not calculate the power in each circuit if you explain your answer.) Figure P27.34
Consider the circuit shown in Figure P28.21 on page 860. (a) Find the voltage across the 3.00-0 resistor, (b) Find the current in the 3.00-12 resistor.
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Digital medical thermometers determine temperature by measuring the resistance of a semiconductor device called a thermistor (which has a=0.06/C ) when it isat the same temperature as the patient. What is a patient’s temperature if the thermistor’s resistance at that temperature is 82.0% of its value at 37C (normal bodytemperature)?
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