COLLEGE PHYSICS LL W/ 6 MONTH ACCESS
2nd Edition
ISBN: 9781319414597
Author: Freedman
Publisher: MAC HIGHER
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Chapter 19, Problem 61QAP
To determine
Forces must the fasteners be able to withstand
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9. (II) A bird stands on a de electric transmission line
carrying 2800 A (Fig. 18–34). The line has 2.5 × 10~$ N
resistance per meter, and the bird's feet are 4.0 cm apart.
What is the potential difference between the bird's feet?
FIGURE 18-34 Problem 9.
The switch S in Fig. 19-90 is
connected downward so that capaci-
tor C, becomes fully charged by the
battery of voltage Vg. If the switch is
then connected upward, determine
the charge on each capacitor after
the switching.
S
C2
FIGURE 19–90
Problem 93.
Vo
Your car was hit by a high voltage DC power line, putting its entire metal body at a potential of 10 kV in relation to the ground. For your own safety, should you exit your car? Explain your response.
Chapter 19 Solutions
COLLEGE PHYSICS LL W/ 6 MONTH ACCESS
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- Why must hospital personnel wear special conducting shoes while working around oxygen in an operating room? What might happen if the personnel wore shoes with rubber soles?arrow_forwardThe immediate cause of many deaths is ventricular fibrillation, an uncoordinated quivering of the heart, as opposed to proper beating. An electric shock to the chest can cause momentary paralysis of the heart muscle, after which the heart will sometimes start organized beating again. A defibrillator is a device that applies a strong electric shock to the chest over a time of a few milliseconds. The device contains a capacitor of a few microfarads, charged to several thousand volts. Electrodes called paddles, about 8 cm across and coated with conducting paste, are held against the chest on both sides of the heart. Their handles are insulated to prevent injury to the operator, who calls Clear! and pushes a button on one paddle to discharge the capacitor through the patient's chest Assume an energy of 3.00 102 W s is to be delivered from a 30.0-F capacitor. To what potential difference must it be charged?arrow_forwardThe immediate cause of many deaths is ventricular fibrillation, which is an uncoordinated quivering of the heart. An electric shock to the chest can cause momentary paralysis of the heart muscle, after which the heart sometimes resumes its proper beating. One type of defibrillator (chapter-opening photo, page 777) applies a strong electric shock to the chest over a time interval of a few milliseconds. This device contains a capacitor of several microfarads, charged to several thousand volts. Electrodes called paddles are held against the chest on both sides of tire heart, and the capacitor is discharged through the patient's chest. Assume an energy of 300 J is to be delivered from a 30.0-F capacitor. To what potential difference must it be charged?arrow_forward
- According to its design specification, the timer circuit delaying the closing of an elevator door is to have a capacitance of 32.0 F between two points A and B. When one circuit is being constructed, the inexpensive but durable capacitor installed between these two points is found to have capacitance 34.8 F. To meet the specification, one additional capacitor can be placed between the two points, (a) Should it be in series or in parallel with the 34.8-F capacitor? (b) What should be its capacitance? (c) What If? The next circuit comes down the assembly line with capacitance 29.8 F between A and B. To meet the specification, what additional capacitor should be installed in series or in parallel in that circuit?arrow_forwardConstruct Your Own Problem Consider a heart defibrillator similar to that discussed in Example 19.11. Construct a problem in which you examine the charge stored in the capacitor of a defibrillator as a function of stored energy. Among the things to be considered are the applied voltage and whether it should vary with energy to be delivered, the range of energies involved, and the capacitance of the defibrillator. You may also wish to consider the much smaller energy needed for defibrillation during open-heart surgery as a variation on this problem.arrow_forwardle electric situations shown in Figure 18-24. Example 18-8 52. • Calculate the voltage difference VA - VB in each of t A 1.05 A 1.05 A A- (Ь) B 2000 2 A- 2000 2 (a) A H (d) B A HH 30 V B 30 V (c) Droblom 52arrow_forward
- If you work out enough to visibly increase the diameter of your biceps, will this increase or decrease your susceptibility to electric shock? Explain.arrow_forward28. Reduce the circuit between terminals A and B in Figure 8-83 to its Norton equivalent. H Foll R₁ 22 ΚΩ R₂ 8.2 ΚΩ www R₂ 15 ΚΩ www Is 10 mA R₂ 10 ΚΩ Message weekCHI... A OBarrow_forward5. (II) What is the ratio of the voltage V, across capacitor C, in Fig. 19–65 to the voltage V2 across capacitor C,? C2 = 1.0 µF C1 = 1.0 μF 10 V . +C3 = 1.0 µF FIGURE 19-65 Problem 45.arrow_forward
- My courses / PHY102-All-21-2-921020/ General / Mid Exam Time left 0:59:14 For the figure shown if the capacitors are connected to a 15V battery 6.00 µF 8.00 µF 2.00 µF 8.00 µF +| Find the equivalent capacitance (lgl go ögI Jbsl u) Find the charge on the 6µF capacitor (lgl go ö J ) Next page ge 99+arrow_forwardthe capacitor discharged (V = 0, Q = 0) Should you close the switch? Why or why not?arrow_forwardWhy do you think it is safe for a small bird or a squirrel to stand on high voltage power lines, but it is not safe if you were to reach up and grab the exact same power line?arrow_forward
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