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1 | |
The total capacitance of two capacitors connected in series is less than that of either capacitor alone. |
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| | A) | True |
| | B) | False |
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2 | |
The capacitance is dependent on the potential difference placed across its plates. |
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| | A) | True |
| | B) | False |
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3 | |
If a conductor has a capacitance of one farad, a transfer of one coulomb of charge to the conductor will increase its potential by one volt. |
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| | A) | True |
| | B) | False |
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4 | |
The capacitance of a given capacitor will be higher if the separation of the plates is reduced without changing the dielectric. |
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| | A) | True |
| | B) | False |
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5 | |
Insertion of a dielectric between the plates of a capacitor decreases the voltage across it and hence reduces the capacitance. |
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| | A) | True |
| | B) | False |
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6 | |
If the charge on a capacitor is doubled, the potential energy will be quadrupled. |
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| | A) | True |
| | B) | False |
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7 | |
For capacitors connected in parallel, the voltage across each capacitor is the same as that across the source. |
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| | A) | True |
| | B) | False |
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8 | |
The amount of charge that can be placed on a conductor does not depend on |
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| | A) | the dielectric strength |
| | B) | its capacitance |
| | C) | its potential |
| | D) | its size or shape |
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9 | |
The capacitance of a capacitor increases with a decrease in |
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| | A) | dielectric constant |
| | B) | permittivity |
| | C) | plate area |
| | D) | plate separation |
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10 | |
Which of the following is not a representation of the potential energy of a conductor? |
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| | A) | ½QV² |
| | B) | Q²/(2 C) |
| | C) | ½QV |
| | D) | ½CV² |
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11 | |
Which of the following is true for capacitors in series? |
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| | A) | The total capacitance is the sum of the individual capacitances. |
| | B) | The total charge is the sum of the charges on each capacitor. |
| | C) | The total voltage is the sum of the voltages across each capacitor. |
| | D) | The available charge is shared between two or more capacitors. |
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12 | |
The plates of a 2-pF capacitor have an extra of 20 cm2. If air is the dielectric, the plate separation must be approximately |
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| | A) | 0.885 mm |
| | B) | 8.85 mm |
| | C) | 88.5 mm |
| | D) | 885 mm |
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13 | |
What potential difference is required to store 24 µC of charge on a 6-µF capacitor? |
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| | A) | 4 V |
| | B) | 0.25 V |
| | C) | 40 V |
| | D) | 144 V |
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14 | |
The voltage across the 3-µF capacitor in Fig. 26-3 is
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| | A) | 4 V |
| | B) | 6 V |
| | C) | 8 V |
| | D) | 12 V |
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15 | |
A certain capacitor has a capacitance of 12 µF when the dielectric is air. The capacitor is charged to 400 V and disconnected from the power source. If a dielectric
(K = 4.0) is inserted, the new voltage will be |
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| | A) | 100 V |
| | B) | 400 V |
| | C) | 800 V |
| | D) | 1600 V |
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16 | |
An 8-µF capacitor is connected to a potential difference of 12 V. The potential energy is |
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| | A) | 4.8 X 10-4 J |
| | B) | 5.76 X 10-4 J |
| | C) | 576 J |
| | D) | 480 J |
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17 | |
The capacitance of a given capacitor will be directly proportional to the of the plates and inversely proportional to . |
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18 | |
The for a given material is that electric field intensity for which the material ceases to be an insulator and becomes a conductor. |
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19 | |
Three advantages for the use of dielectrics with capacitors are , , and . |
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20 | |
Three different physical ratios that can be used to calculate the dielectric constant are , , and . |
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21 | |
The dielectric constant may also be referred to as the relative of a material. |
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22 | |
The total capacitance of a number of capacitors connected in series is (less than, greater than, or the same as) the capacitance of any capacitor taken individually. |
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23 | |
The for a material is the ratio of the capacitance with that material between the plates to the capacitance for a vacuum between the plates. |
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24 | |
For a given capacitor of known charge Q, voltage V, and capacitance C, list three expressions for calculating its potential energy: , ,and . |
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25 | |
A group of capacitors connected directly to the same source of potential difference so that the available charge is shared are said to be connected in . |
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