Question 1

Pulling the plates of an isolated charged capacitor apart:

Accepted Answer

A)  increases the capacitance
B)  increases the potential difference
C)  does not affect the potential difference
D)  decreases the potential difference
E)  does not affect the capacitanceF) A) and D)
G) B) and E)

Question 2

A parallel-plate capacitor has a plate area of 0.30 m2 and a plate separation of 0.10 mm.If the charge on each plate has a magnitude of 5.0 *10-6 C, what is the energy density in its electric field?

Accepted Answer

A)  0.16 J/m3 
B)  3.5 J/m3 
C)  7.8 J/m3
D)  16 J/m3
E)  24 J/m3F) A) and D)
G) C) and D)

Question 3

A battery is used to charge a parallel-plate capacitor, after which it is disconnected.Then the plates are pulled apart to twice their original separation.This process will double the:

Accepted Answer

A)  capacitance
B)  surface charge density on each plate
C)  stored energy
D)  electric field between the two places
E)  charge on each plateF) A) and D)
G) A) and E)

Question 4

Each of the three 25- μ\muμ F capacitors shown is initially uncharged.How many coulombs of charge pass through the ammeter A after the switch S is closed?

Accepted Answer

A)  0.033 C
B)  0.10 C
C)  0.30 C
D)  10 C
E)  none of these F) A) and B)
G) A) and E)

Question 5

The diagram shows six 6- μ\muμ F capacitors.The capacitance between points a and b is:

Accepted Answer

A)  1 μ\muμ F
B)  3  μ\muμ F
C)  4  μ\muμ F
D)  6  μ\muμ F
E)  9  μ\muμ F F) B) and D)
G) None of the above

Question 6

A 2- μ\muμ F and a 1- μ\muμ F capacitor are connected in parallel and a potential difference is applied across the combination.The 2- μ\muμ F capacitor has:

Accepted Answer

A)  twice the charge of the 1- μ\muμ F capacitor
B)  half the charge of the 1- μ\muμ F capacitor
C)  twice the potential difference of the 1- μ\muμ F capacitor
D)  half the potential difference of the 1- μ\muμ F capacitor
E)  none of the above F) B) and C)
G) A) and B)

Question 7

If the charge on a parallel-plate capacitor is doubled:

Accepted Answer

A)  the capacitance is halved
B)  the capacitance is doubled
C)  the electric field is halved
D)  the electric field is doubled
E)  the surface charge density is not changed on either plateF) A) and E)
G) All of the above

Question 8

To charge a 1-F capacitor with 2 C requires a potential difference of:

Accepted Answer

A)  0.2 V
B)  0.5 V
C)  2 V
D)  5 V
E)  none of theseF) B) and D)
G) B) and C)

Question 9

A 2- μ\muμ F and a 1- μ\muμ F capacitor are connected in series and charged by a battery.They store energies P and Q, respectively.When disconnected and charged separately using the same battery, they have energies R and S, respectively.Then:

Accepted Answer

A)  R > P > S > Q
B)  P > Q > R > S
C)  R > P > Q > S
D)  P > R > S > Q
E)  R > S > Q > P F) B) and E)
G) C) and E)

Question 10

Two parallel-plate capacitors with different capacitance but the same plate separation are connected in series to a battery.Both capacitors are filled with air.The quantity that is the same for both capacitors when they are fully charged is:

Accepted Answer

A)  potential difference
B)  stored energy
C)  energy density
D)  electric field between the plates
E)  charge on the positive plateF) A) and D)
G) All of the above

Question 11

Capacitors C1 and C2 are connected in series.The equivalent capacitance is given by:

Accepted Answer

A)  C1C2/(C1 + C2) 
B)  (C1 + C2) /C1C2
C)  1/(C1 + C2) 
D)  C1/C2
E)  C1 + C2F) B) and D)
G) A) and B)

Question 12

The plate areas and plate separations of five parallel plate capacitors are  Rank these according to their capacitances, least to greatest.

Accepted Answer

A)  1, 2, 3, 4, 5
B)  5, 4, 3, 2, 1
C)  5, then 3 and 4 tie, then 1, then 2
D)  4, then 1 and 2 tie, then 5, then 3
E)  3, then 5, then 1 and 2 tie, then 4F) A) and E)
G) A) and D)

Question 13

Let Q denote charge, V denote potential difference and U denote stored energy.Of these quantities, capacitors in series must have the same:

Accepted Answer

A)  Q only
B)  V only
C)  U only
D)  Q and U only
E)  V and U onlyF) A) and C)
G) A) and D)

Question 14

A parallel-plate capacitor C has a charge Q.The actual charges on its plates are:

Accepted Answer

A)  Q, Q
B)  Q/2, Q/2
C)  Q, -Q
D)  Q/2, -Q/2
E)  Q, 0F) A) and B)
G) A) and D)

Question 15

A parallel-plate capacitor has a plate area of 0.3 m2 and a plate separation of 0.1 mm.If the charge on each plate has a magnitude of 5 *10-6 C then the force exerted by one plate on the other has a magnitude of about:

Accepted Answer

A)  5 N
B)  9 N
C)  1 * 104 N
D)  9 *105 N
E)  2* 107 NF) A) and B)
G) B) and C)

Question 16

A battery is used to charge a series combination of two identical capacitors.If the potential difference across the battery terminals is V and total charge Q flows through the battery during the charging process then the charge on the positive plate of each capacitor and the potential difference across each capacitor are:

Accepted Answer

A)  Q/2 and V/2, respectively
B)  Q and V, respectively
C)  Q/2 and V, respectively
D)  Q and V/2, respectively
E)  Q and 2V, respectivelyF) A) and B)
G) None of the above

Question 17

What happens to the atoms in a dielectric when it is placed between the plates of a charged capacitor?

Accepted Answer

A)  They begin to conduct electricity.
B)  They create an induced electric field that is in the opposite direction of the field due to the charges on the plates.
C)  They create an induced electric field that is in the same direction as the field due to the charges on the plates.
D)  They completely cancel the electric field due to the charges on the plates.
E)  They rotate so their positive ends are towards the positively charged plate.F) A) and D)
G) None of the above

Question 18

To store a total of 0.040 J of energy in the two identical capacitors shown, each should have a capacitance of:

Accepted Answer

A)  0.50 μ\muμ F
B)  1.0 μ\muμ F
C)  1.5  μ\muμ F
D)  2.0 μ\muμ F
E)  4.0  μ\muμ F F) A) and B)
G) C) and D)

Question 19

Each of the four capacitors shown is 500  μ\muμ F.The voltmeter reads 1000V.The magnitude of the charge on each capacitor plate is:

Accepted Answer

A)  0.2 C
B)  0.5 C
C)  20 C
D)  50 C
E)  none of these F) C) and D)
G) A) and B)

Question 20

A parallel-plate capacitor has a plate area of 0.2 m2 and a plate separation of 0.1 mm.If the charge on each plate has a magnitude of 4 *10-6 C the potential difference across the plates is approximately:

Accepted Answer

A)  0 V
B)  4 * 10-2 V
C)  2 * 102 V
D)  2 *105 V
E)  4 * 108 VF) C) and D)
G) None of the above

Exam 25: Capacitance

A parallel-plate capacitor has a plate area of 0.2 m² and a plate separation of 0.1 mm.If the charge on each plate has a magnitude of 4 *10^-6 C the potential difference across the plates is approximately:

Correct Answer
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A parallel-plate capacitor has a plate area of 0.3 m² and a plate separation of 0.1 mm.If the charge on each plate has a magnitude of 5 *10^-6 C then the force exerted by one plate on the other has a magnitude of about:

Correct Answer
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What happens to the atoms in a dielectric when it is placed between the plates of a charged capacitor?

Correct Answer
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A parallel-plate capacitor C has a charge Q.The actual charges on its plates are:

Correct Answer
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Correct Answer
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To charge a 1-F capacitor with 2 C requires a potential difference of:

Correct Answer
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Capacitors C₁ and C₂ are connected in series.The equivalent capacitance is given by:

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Let Q denote charge, V denote potential difference and U denote stored energy.Of these quantities, capacitors in series must have the same:

Correct Answer
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A parallel-plate capacitor has a plate area of 0.30 m² and a plate separation of 0.10 mm.If the charge on each plate has a magnitude of 5.0 *10^-6 C, what is the energy density in its electric field?

Correct Answer
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A 2- $\mu$ F and a 1- $\mu$ F capacitor are connected in parallel and a potential difference is applied across the combination.The 2- $\mu$ F capacitor has:

Correct Answer
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The plate areas and plate separations of five parallel plate capacitors are Rank these according to their capacitances, least to greatest.

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The diagram shows six 6- $\mu$ F capacitors.The capacitance between points a and b is: $The diagram shows six 6- \mu F capacitors.The capacitance between points a and b is: A) 1 \mu F B) 3 \mu F C) 4 \mu F D) 6 \mu F E) 9 \mu F$

Correct Answer
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A 2- $\mu$ F and a 1- $\mu$ F capacitor are connected in series and charged by a battery.They store energies P and Q, respectively.When disconnected and charged separately using the same battery, they have energies R and S, respectively.Then:

Correct Answer
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Correct Answer
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Correct Answer
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Two parallel-plate capacitors with different capacitance but the same plate separation are connected in series to a battery.Both capacitors are filled with air.The quantity that is the same for both capacitors when they are fully charged is:

Correct Answer
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If the charge on a parallel-plate capacitor is doubled:

Correct Answer
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Pulling the plates of an isolated charged capacitor apart:

Correct Answer
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A battery is used to charge a parallel-plate capacitor, after which it is disconnected.Then the plates are pulled apart to twice their original separation.This process will double the:

Correct Answer
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To store a total of 0.040 J of energy in the two identical capacitors shown, each should have a capacitance of: $To store a total of 0.040 J of energy in the two identical capacitors shown, each should have a capacitance of: A) 0.50 \mu F B) 1.0 \mu F C) 1.5 \mu F D) 2.0 \mu F E) 4.0 \mu F$

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Exam 25: Capacitance

A parallel-plate capacitor has a plate area of 0.2 m2 and a plate separation of 0.1 mm.If the charge on each plate has a magnitude of 4 *10-6 C the potential difference across the plates is approximately:

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A parallel-plate capacitor has a plate area of 0.3 m2 and a plate separation of 0.1 mm.If the charge on each plate has a magnitude of 5 *10-6 C then the force exerted by one plate on the other has a magnitude of about:

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What happens to the atoms in a dielectric when it is placed between the plates of a charged capacitor?

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A parallel-plate capacitor C has a charge Q.The actual charges on its plates are:

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Each of the three 25- μ\muμ F capacitors shown is initially uncharged.How many coulombs of charge pass through the ammeter A after the switch S is closed?

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To charge a 1-F capacitor with 2 C requires a potential difference of:

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Capacitors C1 and C2 are connected in series.The equivalent capacitance is given by:

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Let Q denote charge, V denote potential difference and U denote stored energy.Of these quantities, capacitors in series must have the same:

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A parallel-plate capacitor has a plate area of 0.30 m2 and a plate separation of 0.10 mm.If the charge on each plate has a magnitude of 5.0 *10-6 C, what is the energy density in its electric field?

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A 2- μ\muμ F and a 1- μ\muμ F capacitor are connected in parallel and a potential difference is applied across the combination.The 2- μ\muμ F capacitor has:

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The plate areas and plate separations of five parallel plate capacitors are Rank these according to their capacitances, least to greatest.

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The diagram shows six 6- μ\muμ F capacitors.The capacitance between points a and b is:

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A 2- μ\muμ F and a 1- μ\muμ F capacitor are connected in series and charged by a battery.They store energies P and Q, respectively.When disconnected and charged separately using the same battery, they have energies R and S, respectively.Then:

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Correct AnswerverifiedShow Answer

Each of the four capacitors shown is 500 μ\muμ F.The voltmeter reads 1000V.The magnitude of the charge on each capacitor plate is:

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Two parallel-plate capacitors with different capacitance but the same plate separation are connected in series to a battery.Both capacitors are filled with air.The quantity that is the same for both capacitors when they are fully charged is:

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If the charge on a parallel-plate capacitor is doubled:

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Pulling the plates of an isolated charged capacitor apart:

Correct AnswerverifiedShow Answer

A battery is used to charge a parallel-plate capacitor, after which it is disconnected.Then the plates are pulled apart to twice their original separation.This process will double the:

Correct AnswerverifiedShow Answer

To store a total of 0.040 J of energy in the two identical capacitors shown, each should have a capacitance of:

Correct AnswerverifiedShow Answer

A parallel-plate capacitor has a plate area of 0.2 m² and a plate separation of 0.1 mm.If the charge on each plate has a magnitude of 4 *10^-6 C the potential difference across the plates is approximately:

Correct Answer
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A parallel-plate capacitor has a plate area of 0.3 m² and a plate separation of 0.1 mm.If the charge on each plate has a magnitude of 5 *10^-6 C then the force exerted by one plate on the other has a magnitude of about:

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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Capacitors C₁ and C₂ are connected in series.The equivalent capacitance is given by:

Correct Answer
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Correct Answer
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A parallel-plate capacitor has a plate area of 0.30 m² and a plate separation of 0.10 mm.If the charge on each plate has a magnitude of 5.0 *10^-6 C, what is the energy density in its electric field?

Correct Answer
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A 2- $\mu$ F and a 1- $\mu$ F capacitor are connected in parallel and a potential difference is applied across the combination.The 2- $\mu$ F capacitor has:

Correct Answer
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Correct Answer
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The diagram shows six 6- $\mu$ F capacitors.The capacitance between points a and b is: $The diagram shows six 6- \mu F capacitors.The capacitance between points a and b is: A) 1 \mu F B) 3 \mu F C) 4 \mu F D) 6 \mu F E) 9 \mu F$

Correct Answer
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A 2- $\mu$ F and a 1- $\mu$ F capacitor are connected in series and charged by a battery.They store energies P and Q, respectively.When disconnected and charged separately using the same battery, they have energies R and S, respectively.Then:

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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To store a total of 0.040 J of energy in the two identical capacitors shown, each should have a capacitance of: $To store a total of 0.040 J of energy in the two identical capacitors shown, each should have a capacitance of: A) 0.50 \mu F B) 1.0 \mu F C) 1.5 \mu F D) 2.0 \mu F E) 4.0 \mu F$

Correct Answer
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