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1 | |
When the electric field does negative work in moving a charge from infinity to point B, the potential energy of the charge at B will also be negative. |
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| | A) | True |
| | B) | False |
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2 | |
The electric potential energy is positive in the vicinity of a positive charge and negative in the vicinity of a negative charge. |
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| | A) | True |
| | B) | False |
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3 | |
Electric potential at a point is a property of the space, whereas electric potential energy cannot exist unless a charge is placed at that point. |
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| | A) | True |
| | B) | False |
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4 | |
Whenever a negative charge is moved from a point of high potential to a point of low potential, its potential energy is increased. |
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| | A) | True |
| | B) | False |
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5 | |
The electric potential in the vicinity of a number of charges is equal to the algebraic sum of the potentials due to each charge. |
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| | A) | True |
| | B) | False |
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6 | |
A negative potential means that the electric field will hold on to positive charge, and work must be done by an external agent to remove it. |
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| | A) | True |
| | B) | False |
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7 | |
If the potential is zero at a point, the electric field also must be zero at that point. |
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| | A) | True |
| | B) | False |
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8 | |
The electric field between two oppositely charged plates is equal to the product of the voltage and the plate separation. |
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| | A) | True |
| | B) | False |
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9 | |
The electronvolt is a unit of potential difference. |
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| | A) | True |
| | B) | False |
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10 | |
The surface of any conductor is an equipotential surface. |
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| | A) | True |
| | B) | False |
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11 | |
When a negative charge is moved from a point of low potential to a point of high potential, its potential energy |
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| | A) | increases |
| | B) | decreases |
| | C) | stays the same |
| | D) | increases and then decreases |
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12 | |
The potential energy at a given point is independent of the |
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| | A) | work required to bring a charge to that point |
| | B) | electric field |
| | C) | path taken to reach that point |
| | D) | magnitude of a charge at that point |
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13 | |
In the vicinity of a negative charge, |
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| | A) | the potential is always negative |
| | B) | the potential energy is always negative |
| | C) | the potential energy is always positive |
| | D) | the potential is always positive |
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14 | |
Which of the following represents a unit of energy? |
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| | A) | V |
| | B) | N/C |
| | C) | J/C |
| | D) | eV |
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15 | |
The Millikan oil-drop experiment was used primarily to determine the |
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| | A) | mass of an electron |
| | B) | charge of an electron |
| | C) | electron charge to mass ratio |
| | D) | density of oil |
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16 | |
The electric potential is zero |
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| | A) | inside a conductor |
| | B) | halfway between +q and -q |
| | C) | halfway between +q and +q |
| | D) | on a line between +q and -q |
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17 | |
A 3-nC charge is located 2 m away from another charge of 40 µC. The potential energy is |
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| | A) | 1.8 X 10-4 J |
| | B) | 2.7 X 10-4 J |
| | C) | 5.4 X 10-4 J |
| | D) | 6.9 X 10-4 J |
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18 | |
A charge of +4 µC is 10 cm to the right of a -12-μC charge. The electric potential at a point midway between the two charges is approximately |
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| | A) | 1.44 µV |
| | B) | -1.44 µV |
| | C) | 72 µV |
| | D) | -2.16 µV |
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19 | |
Points A and B are located 6 and 10 cm away, respectively, from a -24-µC charge. The potential difference VA - VB is approximately |
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| | A) | -1.44 µV |
| | B) | 1.44 µV |
| | C) | -5.04 µV |
| | D) | 5.04 µV |
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20 | |
A 16-µC charge is located 8 cm to the right of a -8-µC charge. How much work will be done by the electric field in moving a 2-nC charge from a point midway between the two charges to a point 4 cm to the left of the -8-µC charge? |
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| | A) | 2.4 MJ |
| | B) | 4.8 MJ |
| | C) | -2.4 MJ |
| | D) | -4.8 MJ |
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21 | |
The at a point is equal to the negative of the work per unit charge done by electric forces in bringing a positive charge from infinity. |
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22 | |
The potential in the vicinity of a positive charge is , and the potential in the vicinity of a negative charge is . |
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23 | |
The potential in the vicinity of a number of charges is equal to the of the potentials due to each charge. |
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24 | |
A potential of 1 V means that a charge of will have a potential energy of when placed at that point. |
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25 | |
The potential difference between two oppositely charged plates is equal to the product of the and the . |
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26 | |
The is a unit of energy equivalent to the energy acquired by an electron that accelerated through a potential difference of one volt. |
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27 | |
The work done by an electric field in moving a charge from a point of potential VA to a point of potential VB is equal to the product of and . |
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28 | |
The volt per meter is a unit of and is equivalent to the unit . |
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29 | |
A(n) potential energy means that work must be done the electric field in removing a charge from the field. |
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30 | |
Whenever a positive charge is moved against the electric field, its potential energy ;whenever a negative charge moves against an electric field, its potential energy . |
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