Capacitance and Capacitor in series and parallel

A parallel-plate capacitor is connected to a battery. What happens when a dielectric is inserted between plates?

• the capacitance decreases

• the voltage increases

• the charge increases

• none of the above

Which of the following has greater dielectric constant?

• teflon

• mica

• air or vacuum

• glass (pyrex)

The voltages across each capacitor in parallel connection:

• will vary depending on the capacitance

• are equal

• are equal to zero

• none of the choices

You insert a dielectric into an air-filled capacitor. How does this affect the energy stored in the capacitor?

• Energy stored in the capacitor will remain same.

• Energy stored in the capacitor will decrease.

• Energy stored in the capacitor will increase.

• Energy stored in the capacitor will increase first, and then it will decrease.

A unit of stored energy:

• Farad/meter

• Coulomb

• Joules

• Volts

In a parallel-plate capacitor, the capacitance is directly proportional to:

• plate area

•   Potential difference of the plates

• a.     Separation of the plates

• none of the choices

Which of the following is TRUE?

• plate  area directly affects capacitance

• larger plates increase capacitance

• Capacitance enhances energy storage capacity

• All of the choices

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

• Increasing the charge inside

• Decreasing the charge inside

• Increasing the plate separation

• Decreasing the plate separation

In order to increase energy-storage capability of a parallel-plate capacitor, which of the following can be done

• Increase the plate separation distance

•   increase the area of plate

• repulsove force

• electric field

A __________connection has 2 or more components connected so that there is only 1 path for current to flow.

• series

• perpendicular

• polarized

• parallel / series