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WM4Problems

# WM4Problems - (f If R2 decreases the current through R3(g...

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WM 4 : CHAPTER 26, QUESTIONS 8, 9, 11 CHAPTER 26, PROBLEMS 9, 11, 29, 31 Last workshop before the first midterm – use it for questions! QUESTIONS: Q26-8) Explain why Kirchhoff’s junction rule is based on conservation of electric charge. Q26-9) Explain why Kirchhoff’s loop rule is a result of the conservation of energy. Q26-11) Given the circuit shown in Fig. 26-32, use the words “increase”, “decrease”, or “stays the same” to complete the following statements: (a) If R7 increases, the potential difference between A and E ... (assume no resistance in the ampere meter and the battery) (b) If R7 increases, the potential difference between A and E ... (assume resistance in the ampere meter and the battery) (c) If R7 increases, the voltage drop across R4... (d) If R2 decreases, the current through R1... (e) If R2 decreases, the current through R6...
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Unformatted text preview: .. (f) If R2 decreases, the current through R3. .. (g) If R5 increases, the voltage drop across R2. .. (h) If R5 increases, the voltage drop across R4. .. (i) If R2, R5,and R7 increase, the voltage on the battery. ... PROBLEMS: P26-9) Suppose that you have a 6.0V battery and you wish to apply a voltage of only 4.0V. Given an unlimited supply of 1.0 W resistors, how could you connect them so as to make a “voltage divider” that produces a 4.0V output for a 6.0V input? P26-11) What is the net resistance of the circuit connected to the battery in Fig. 26-35? Each resistance has R = 2.8 k W . P26-29) Determine the current through each of the resistors in Fig. 26-41. P26-31) The current through the 4.0 k W resistor in Fig. 26-42 is 3.50 mA. What is the terminal voltage Vba of the “unknown” battery? (There are two answers. Why?)...
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