Bartleby Sitemap - Textbook Solutions
All Textbook Solutions for Physics: Principles with Applications
14P15P16P17P18P19P20P21P22P23P24P25P26P27P28P29P30P31P32P33P34P35P36P37P38P39P40P41P42P43P44P45P46P47P48P49P50P51GP52GP53GP54GP55GP56GP57GP58GP59GP60GP61GP62GP63GP64GP65GP66GP67GP68GPIf you charge a pocket comb by rubbing it with a silk scarf, how can you determine if the comb is positively or negatively charged?Why does a shirt or blouse taken from a clothes dryer sometimes cling to your body?Explain why fog or rain droplets tend to form around ions or electrons in the air.Why does a plastic ruler that has been rubbed with a cloth have the ability to pick up small pieces of paper? Why is this difficult to do on a humid day?5QA positively charged rod is brought close to a neutral piece of paper, which it attracts. Draw a diagram showing the separation of charge in the paper, and explain why attraction occurs.7QFigures 16-7 and 16-8 show how a charged rod placed near an uncharged metal object can attract (or repel) electrons. There are a great many electrons in the metal, yet only some of them move as shown. Why not all of them?9Q10Q11Q12Q13Q14Q15Q16Q17QAssume that the two opposite charges in Fig. 16-32a are 12.0 cm apart. Consider the magnitude of the electric field 2.5 cm from the positive charge. On which side of this charge—top, bottom, left, or right—is the electric field the strongest? The weakest? Explain.Consider the electric field at the three points indicated by the letters A, B, and C in Fig. 16—49. First draw an arrow at each point indicating the direction of the net force that a positive test charge would experience if placed at that point, then list the letters in order of decreasing field strength (strongest first). Explain.Why can electric field lines never cross?Show, using the three rules for field lines given in Section 16—8, that the electric field lines starting or ending on a single point charge must be symmetrically spaced around the charge.Given two point charges, Q and 2Q, a distance l apart, is there a point along the straight line that passes through them where E = 0 when their signs are (a) opposite, (b) the same? If yes, state roughly where this point will be.Consider a small positive test charge located on an electric field line at some point, such as point P in Fig. 16—32a. Is the direction of the velocity and/or acceleration of the test charge along this line? Discuss.A point charge is surrounded by a spherical gaussian surface of radius r. If the sphere is replaced by a cube of side r, will E be larger, smaller, or the same? Explain.1P2P3P4P5P6P7P8P9P10P11P12P13P14P15P16P17P18P19P20P21P22P23P24P25P26P27P28P29P30P31P32P33P34P35P36P37P38P39P40P41P42P43P44P45P46P47P48P49P50P51P52GP53GP54GP55GP56GP57GP58GP59GP60GP61GP62GP63GP64GP65GP66GP67GP68GP69GP70GP71GP72GP73GP1QIf a negative charge is initially at rest in an electric field, will it move toward a region of higher potential or lower potential? What about a positive charge? How does the potential energy of the charge change in each instance? ExplainState clearly the difference (a) between electric potential and electric field, (b) between electric potential and electric potential energy.An electron is accelerated from rest by a potential difference of 0.20 V. How much greater would its final speed be if it is accelerated with four times as much voltage? Explain.5Q6QCan two equipotential lines cross? Explain8QWhen a battery is connected to a capacitor, why do the two plates acquire charges of the same magnitude? Will this be true if the two plates are different sizes or shapes?The parallel plates of an isolated capacitor carry opposite charges, Q. If the separation of the plates is increased, is a force required to do so? Is the potential difference changed? What happens to the work done in the pulling process?11Q12Q13Q14Q15Q1P2P3P4P5P6P7P8P9P10P11P12P13P14P15P16P17P18P19P20P21P22P23P24P25P26P27P28P29P30P31P32P33P34P35P36P37P38P39P40P41P42P43P44P45P46P47P48P49P50P51P52P53P54P55GP56GP57GP58GP59GP60GP61GP62GP63GP64GP65GP66GP67GP68GP69GP70GP71GP72GP73GP74GP75GP76GP77GP78GPWhen an electric cell is connected to a circuit, electrons flow away from the negative terminal in the circuit. But within the cell, electrons flow to the negative terminal. Explain.When a flashlight is operated, what is being used up: battery current, battery voltage, battery energy, battery power, or battery resistance? Explain.3Q4Q5QWhat happens when aIightbulb burns out?7Q8Q9Q10Q11Q12QWhen electric lights are operated on low-frequency ac (say, 5 Hz),they flicker noticeably. Why?14Q15Q16Q17Q18Q19Q1P2P3P4P5P6P7P8P9P10P11P12P13P14P15P16P17P18P19P20P21P22P23P24P25P26P27P28P29P30P31P32P33P34P35P36P