Two capacitors, each 10 Farads, are connected together to create a 5 Farad capac

Question

Two capacitors, each 10 Farads, are connected together to create a 5 Farad capacitor. They must be connected in:

2.

Two capacitors have the same charge Q on them - which one will store more energy?

3.

You increase the voltage across a parallel plate capacitor (e.g., you turn up the voltage knob on a power supply). You have:

4.

The bigger the capacitance, the

5.

A dielectric:

6.

To get the greatest capacitance you can, you would want to have plates that are:

Two capacitors, each 10 Farads, are connected together to create a 5 Farad capacitor. They must be connected in:

A) parallel
B) neither series nor parallel
C) series
D) either series or parallel

2.

Two capacitors have the same charge Q on them - which one will store more energy?

A) the one with the smaller C
B) they will both store the same energy
C) the one with the larger C
D) cannot determine from information provided

3.

You increase the voltage across a parallel plate capacitor (e.g., you turn up the voltage knob on a power supply). You have:

A) Increased the charge on the capacitor, not changed the capacitance of the capacitor
B) Increased the capacitance of the capacitor, not changed the charge on the capacitor
C) Not changed either the capacitance nor the charge on the capacitor
D) Decrease the charge on the capacitor, not changed the capacitance of the capacitor
E) Decreased the capacitance of the capacitor, not changed the charge on the capacitor

4.

The bigger the capacitance, the

A) more charge on its plates for a given potential difference between its plates
B) greater potential difference between the plates independent of the charge on the plates
C) greater the potential difference across its plates, for a given charge on the plates
D) more charge on the plates independent of the potential difference across the plates
E) electric field between the plates

5.

A dielectric:

A) is a conductor and decreases the capacitance when put between the plates of a capacitor
B) is an insulator and increases the capacitance when put between the plates of a capacitor
C) is an insulator and decreases the capacitance when put between the plates of a capacitor
D) is a conductor and increases the capacitance when put between the plates of a capacitor

6.

To get the greatest capacitance you can, you would want to have plates that are:

A) large and far apart
B) large and close together
C) small and far apart
D) small and close together

Explanation / Answer

1 C

for series Ceq = = C1*C2/(C1+C2) = C/2

2 A

E = 1/2 Q^2/C

3. A ) Increased the charge on the capacitor, not changed the capacitance of the capacitor

Q= CV

4. A) more charge on its plates for a given potential difference between its plates

Q= CV

5. B) is an insulator and increases the capacitance when put between the plates of a capacitor

C' = eC e>1

6)

B) large and close together since C = e0A/d

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