Ch24 - University Physics 15th edition PDF

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University Physics 15th edition...

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A24.1

The two conductors a and b are insulated from each other, forming a capacitor. You increase the charge on a to +2Q and increase the charge on b to –2Q, while keeping the conductors in the same positions. As a result of this change, the capacitance C of the two conductors A. becomes four times as great. B. becomes twice as great.

C. remains the same. D. becomes half as great.

E. becomes one-quarter as great. © 2020 Pearson Education, Inc.

A24.2

You reposition the two plates of a capacitor so that the capacitance doubles. There is vacuum between the plates. If the charges +Q and –Q on the two plates are kept constant in this process, what happens to the potential difference Vab between the two plates?

A. Vab becomes four times as great.

B. Vab becomes twice as great. C. Vab remains the same.

D. Vab becomes half as great. E. Vab becomes one-quarter as great. © 2020 Pearson Education, Inc.

A24.3

A capacitor and a capacitor are connected together as shown. What is the equivalent capacitance of the two capacitors as a unit?

a

b

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A24.4

A capacitor and a capacitor are connected together as shown. If the charge on the capacitor is 24 microcoulombs what is the charge on the capacitor?

a

b

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A24.5

a

A capacitor and a capacitor are connected together as shown. What is the equivalent capacitance of the two capacitors as a unit?

b

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A24.6

A conne on the

apacitor and capacitor are together as shown. If the charge capacitor is 24 microcoulombs what is the charge on the capacitor?

a

b

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A24.7

You reposition the two plates of a capacitor so that the capacitance doubles. There is vacuum between the plates. If the charges +Q and –Q on the two plates are kept constant in this process, the energy stored in the capacitor A. becomes four times as great. B. becomes twice as great.

C. remains the same. D. becomes half as great.

E. becomes one-quarter as great.

© 2020 Pearson Education, Inc.

A24.8

You want to connect a capacitor and a capacitor. How should you connect them so that when the capacitors are charged, the capacitor will have a greater amount of stored energy than the capacitor? A. The two capacitors should be in series. B. The two capacitors should be in parallel.

C. The two capacitors can be either in series or in parallel—in either case, the capacitor will have a greater amount of stored energy. D. The connection should be neither series nor parallel. E. This is impossible no matter how the two capacitors are connected. © 2020 Pearson Education, Inc.

A24.9

You slide a slab of dielectric between the plates of a parallel-plate capacitor. As you do this, the charges on the plates remain constant. What effect does adding the dielectric have on the potential difference between the capacitor plates?

A. The potential difference increases. B. The potential difference decreases.

C. The potential difference remains the same. D. Two of A, B, and C are possible. E. All three of A, B, or C are possible.

© 2020 Pearson Education, Inc.

A24.10

You slide a slab of dielectric between the plates of a parallel-plate capacitor. As you do this, the charges on the plates remain constant. What effect does adding the dielectric have on the energy stored in the capacitor?

A. The stored energy increases. B. The stored energy decreases.

C. The stored energy remains the same. D. Two of A, B, and C are possible. E. All three of A, B, or C are possible.

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A24.11

You slide a slab of dielectric between the plates of a parallel-plate capacitor. As you do this, the potential difference between the plates remains constant. What effect does adding the dielectric have on the amount of charge on each of the capacitor plates?

A. The amount of charge increases. B. The amount of charge decreases.

C. The amount of charge remains the same. D. Two of A, B, and C are possible. E. All three of A, B, or C are possible.

© 2020 Pearson Education, Inc.

A24.12

You slide a slab of dielectric between the plates of a parallel-plate capacitor. As you do this, the potential difference between the plates remains constant. What effect does adding the dielectric have on the energy stored in the capacitor?

A. The stored energy increases. B. The stored energy decreases.

C. The stored energy remains the same. D. Two of A, B, and C are possible. E. All three of A, B, or C are possible.

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A-RT24.1

An isolated parallel-plate capacitor has charges Q and –Q on its two plates. A dielectric slab with K = 4.00 is then inserted into the space between the plates, and completely fills the space. Rank the following electric-field magnitudes in order from largest to smallest.

A. the field between the plates before the slab is inserted B. the resultant field between the plates after the slab is inserted C. the field between the plates due to the bound charges

Answer: ACB © 2020 Pearson Education, Inc....