Serway_CP_poll_ch15

Serway_CP_poll_ch15 - Doug rubs a piece of fur on a hard...

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Doug rubs a piece of fur on a hard rubber rod, giving the rod a negative charge. What happens? 1 2 3 4 25% 25% 25% 25% 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 1. protons are removed from the rod 2. electrons are added to the rod 3. the fur is also charged negatively 4. the fur is left neutral
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Two point charges are 4 cm apart. They are moved to a new separation of 2 cm. By what factor does the resulting mutual force between them change? 1 2 3 4 25% 25% 25% 25% 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 1. 1/2 2. 2 3. 1/4 4. 4
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on: 1 2 3 4 25% 25% 25% 25% 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 1. the shape of the conductor 2. mass density of the conductor 3. type of metal of which the conductor is made 4. strength of the earth's gravitational field
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An uncharged conductor is supported by an insulating of the conductor, but do not touch it. The right end of the conductor will be: 1 2 3 4 25% 25% 25% 25% 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 1. negative 2. positive 3. neutral 4. attracted
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The electric field at the surface of a positively charged conductor has a direction characterized by which of the following? 1 2 3 4 25% 25% 25% 25% 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 1. tangent to the surface 2. perpendicular inward toward the charge 3. at a 45° angle to the surface 4. perpendicular outward and away from the charge
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field at a point midway between the two charges? ( k = 9 x 10 9 SI unit) 1 2 3 4 25% 25% 25% 25% 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 40.5 x 10 7 N/C 20.3 x 10 7 N/C 10.1 x 10 7 N/C zero
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Two point charges are separated by 10 cm and have I electric field at a point midway between the two charges? 1 2 3 4 25% 25% 25% 25% 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 28.8 x 10 6 N/C 14.4 x 10 6 N/C 7.2 x 10 6 N/C zero
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The number of electric field lines passing through a unit cross sectional area is indicative of: 1 2 3 4 25% 25% 25% 25% 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 1. field direction 2. charge density 3. field strength 4. charge motion
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Of the following substances, which one contains the highest density of free electrons? 1 2 3 4 25% 25% 25% 25% 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 1. hard rubber 2. iron 3. amber 4. glass
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Which of the following best characterizes electrical conductors? 1 2 3 4 25% 25% 25% 25% 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 1. low mass density 2. high tensile strength 3. electric charges move freely 4. poor heat conductors
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Which of the following best characterizes electrical insulators?
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Serway_CP_poll_ch15 - Doug rubs a piece of fur on a hard...

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