Chapter 24 Prelecture Questions

Which of the following statements are true?

-The capacitance of a capacitor depends upon a structure -The electric field between the points of a parallel-plate capacitor is uniform -A capacitor is a device that stores electric potential energy and electric storage

Consider two capacitors with unequal capacitance connected in series to a battery. Which of the following statements are true?

-The charge stored on each of the capacitors is the same -The equivalent capacitance fo the two capacitors is less than the capacitance of either of the capacitors -The algebraic sum of the voltages across the two capacitors is equal to the voltage supplied by the battery

Consider two capacitors with unequal capacitance connected in parallel to a battery. Which of the following statements are true?

-The equivalent capacitance of the combination is greater than the capacitance of either of the capacitance -The sum o the charge stored on each capacitor is equal to the charge supplied by the battery -The voltage across the capacitors is the same

Which of the following will increase the capacitance of a parallel-plate capacitor?

-decreasing the separation between the plates will increase the capacitance of a parallel-plate capacitor -increasing the area of the plates will increase the capacitance of a parallel-plate capacitor

Which of the following statements are true about conductors?

-the insertion of a dielectric material between the two conductors in a capacitor allows a higher voltage to be applied to the capacitor -the insertion of a dielectric material between the two conductors in a capacitor allows the plates of the capacitor to be placed closer together without touching

The plates of a parallel-plate capacitor are maintained with a constant voltage by a battery as they are pushed together, without touching. How is the amount go charge on the plates affected during this process?

The amount of charge on the plates increases during this process.

If a dielectric material, such as Teflon, is placed between the plates of a parallel-plate capacitor without altering the structure of the capacitor. How is the capacitance affected?

The capacitance increases because of the insertion of Teflon

A dielectric material, such as Teflon, is placed between the plates of a parallel-plate capacitor without altering the structure of the capacitor. The charge on the capacitor is held fixed. How is the electric field between the two plates of the capacitor affected?

The electric field decreases because of the insertion of Teflon

The voltage applied across a given parallel-plate capacitor is doubled. How is the energy stored in the capacitor affected?

The energy stored in the capacitor quadruples its original value

A parallel-plate capacitor connected to a battery becomes fully charged. After the capacitor from the battery is disconnected, the separation between the plates of the capacitor is doubled in such a way that no charge leaks off. How is the energy stored in the capacitor affected?

The energy stored int he capacitor doubles its original value

The plates of a parallel-plate capacitor are maintained with a constant voltage by a battery as they are pulled apart. How is the strength of the electric field affected during this process?

The strength of the electric field decreases during this process

A dielectric material, such as Teflon, is placed between the plates of the parallel-plate capacitor without altering the structure of the capacitor. The charge on the capacitor is held fixed. How is the voltage across the capacitor affected?

The voltage decreases because of the insertion of Teflon