# Electrical Energy And Capacitance (16)

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| By Locolais
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Locolais
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Multiple choice chapter 16

• 1.
• A.

3.4e-16

• B.

-3.4e-16

• C.

2.5e-16

• D.

-2.5e-16

• E.

-1.6e-19

B. -3.4e-16
• 2.
• A.

1.00e4

• B.

1.60e-15

• C.

1.60e-22

• D.

6.25e22

• E.

1.60e-19

A. 1.00e4
• 3.
• A.

140N/C

• B.

-140N/C

• C.

35N/C

• D.

-35N/C

• E.

-75N/C

D. -35N/C
• 4.
• A.

7.91e5

• B.

3.78e5

• C.

2.13e5

• D.

2.52e6

• E.

3.01e8

B. 3.78e5
• 5.
• A.

The equivalent capacitance is greater than any of the individual capacitances

• B.

The largest voltage appears across the capacitor with the smallest capacitance

• C.

The largest voltage appears across the capacitor with the largest capacitance

• D.

The capacitor with the largest capacitance has the greatest charge

• E.

The capacitor with the smallest capacitance has the smallest charge

B. The largest voltage appears across the capacitor with the smallest capacitance
• 6.
• A.

18e4

• B.

4.5e4

• C.

0

• D.

-4.5e4

• E.

9e4

B. 4.5e4
• 7.
• A.

88.5 pF

• B.

177 pF

• C.

8.85 uF

• D.

100 uF

• E.

354 uF

A. 88.5 pF
• 8.
• A.

It remains the same

• B.

It is doubled

• C.

It decreases by factor of 2

• D.

It decreases by factor of 4

• E.

It increases by factor of 4

C. It decreases by factor of 2
• 9.
• A.

The voltage across the capacitor decreases by factor of 2

• B.

The voltage across the capacitor is doubled

• C.

The charge on the plates is doubled

• D.

The charge on the plates decreases by factor of 2

• E.

The electric field is doubled

A. The voltage across the capacitor decreases by factor of 2
Explanation
When the voltage across a capacitor decreases by a factor of 2, it means that the potential difference between the two plates of the capacitor decreases to half of its original value. This can happen when the capacitor discharges or when the voltage source connected to the capacitor decreases. As the voltage across the capacitor decreases, the electric field between the plates also decreases, causing a decrease in the stored charge on the plates.

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• 10.
• A.

Energy stored in the capacitor decreases

• B.

Energy stored in the capacitor increases

• C.

The electric field between the plates decreses

• D.

The potential difference between the plates decreases

• E.

The charge on the plates decreases

B. Energy stored in the capacitor increases
• 11.
• A.

All capacitors have same charge and the equivalent capacitance is greater than the capacitance of any of the capacitors in the group

• B.

The capacitor with the largest capacitance carries the smallest charge

• C.

The potential difference across each capacitor is the same and the equivalent capacitance is greater than any of the capacitors in the groups

• D.

The capacitor with the smallest capacitance carries the largest charge

• E.

The potential differences across the capacitors are the same only if the capacitances are the same

C. The potential difference across each capacitor is the same and the equivalent capacitance is greater than any of the capacitors in the groups
• 12.

### A battery is attached across several different capacitors connected in series. Which of the following statements are true?

• A.

All the capacitors have the same charge and the equivalent capacitance is less than the capacitance of any of the individual capacitors in the group and the largest potential difference appears across the capacitor with the smallest capacitance

• B.

All the capacitors have the same charge and the equivalent capacitance is greater than any of the individual capacitors in the groups

• C.

The capacitor with the largest capacitance carries the largest charge

• D.

The potential difference across each capacitor must be the same

• E.

The largest potential difference appears across the capacitor having the largest capacitance

A. All the capacitors have the same charge and the equivalent capacitance is less than the capacitance of any of the individual capacitors in the group and the largest potential difference appears across the capacitor with the smallest capacitance
Explanation
When capacitors are connected in series, they share the same charge. This means that the charge on each capacitor is equal. Additionally, when capacitors are connected in series, the equivalent capacitance of the group is always less than the capacitance of any individual capacitor. This is because the total capacitance is inversely proportional to the sum of the reciprocals of the individual capacitances. Lastly, the largest potential difference appears across the capacitor with the smallest capacitance. This is because the potential difference is directly proportional to the reciprocal of the capacitance.

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• Current Version
• Mar 15, 2023
Quiz Edited by
ProProfs Editorial Team
• Feb 24, 2013
Quiz Created by
Locolais

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