Electrical Energy And Capacitance (16)

2.

1.00e4
1.60e-15
1.60e-22
6.25e22
1.60e-19

Correct Answer

A. 1.00e4

3.

140N/C
-140N/C
35N/C
-35N/C
-75N/C

Correct Answer

A. -35N/C

4.

7.91e5
3.78e5
2.13e5
2.52e6
3.01e8

Correct Answer

A. 3.78e5

5.

The equivalent capacitance is greater than any of the individual capacitances
The largest voltage appears across the capacitor with the smallest capacitance
The largest voltage appears across the capacitor with the largest capacitance
The capacitor with the largest capacitance has the greatest charge
The capacitor with the smallest capacitance has the smallest charge

Correct Answer

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

6.

18e4
4.5e4
0
-4.5e4
9e4

Correct Answer

A. 4.5e4

7.

88.5 pF
177 pF
8.85 uF
100 uF
354 uF

Correct Answer

A. 88.5 pF

8.

It remains the same
It is doubled
It decreases by factor of 2
It decreases by factor of 4
It increases by factor of 4

Correct Answer

A. It decreases by factor of 2

9.

The voltage across the capacitor decreases by factor of 2
The voltage across the capacitor is doubled
The charge on the plates is doubled
The charge on the plates decreases by factor of 2
The electric field is doubled

Correct Answer

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.

Energy stored in the capacitor decreases
Energy stored in the capacitor increases
The electric field between the plates decreses
The potential difference between the plates decreases
The charge on the plates decreases

Correct Answer

A. Energy stored in the capacitor increases

11.

All capacitors have same charge and the equivalent capacitance is greater than the capacitance of any of the capacitors in the group
The capacitor with the largest capacitance carries the smallest charge
The potential difference across each capacitor is the same and the equivalent capacitance is greater than any of the capacitors in the groups
The capacitor with the smallest capacitance carries the largest charge
The potential differences across the capacitors are the same only if the capacitances are the same

Correct Answer

A. 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?

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
All the capacitors have the same charge and the equivalent capacitance is greater than any of the individual capacitors in the groups
The capacitor with the largest capacitance carries the largest charge
The potential difference across each capacitor must be the same
The largest potential difference appears across the capacitor having the largest capacitance

Correct Answer

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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Electrical Energy And Capacitance (16)

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