CAPACITANCE AND DIELECTRIC

In charging up a capacitor, a battery does work in transferring an increment of charge from one plate of the capacitor to the other plate and will be stored as an electrical potential energy in the capacitor. Which of the following statements BEST describes work?

• Work is the ratio of charges and potential difference that can be stowed inside the metal plate capacitors

• Work is affected by the geometry of the plates and other factors such as dielectric constant of the material between them

• Work is the density of energy that can be stored inside the capacitor

• Work is equal to the product of the charge increment and the potential difference between the plates.

An empty parallel plate capacitor is connected to a battery that maintains a constant potential difference between the plates. A dielectric is inserted between the plates, what will happen to the capacitance of the system?

• Increase, a dielectric material is used to higher the capacitance of the system.

• Decrease, a dielectric material is used to lower the capacitance of the system

• Remains the same with the value of potential difference because they are directly proportional with one another.

• Remains the same with the value of potential difference because capacitance is not affected by the dielectric

A parallel plate capacitor is charged up by a battery. The battery is then disconnected, but the charge remains on the plates. The plates are then pulled apart, what will happen to the electric potential energy stored by the capacitor?

• Increase, because there are still charges remain on the plates

• No

  Increase, because distance has not something to do with the potential energy

• Decrease, because distance is inversely proportional with the electric potential energy

• Decrease, because charge is inversely proportional with the electric potential energy

A. Series circuit means that the devices are connected in such a way that there is the unequal electric current through each device.

B. Series circuit means that the potential difference is different in each capacitor.

• statement A alone is TRUE

• statement B alone is TRUE

• statements A and B are TRUE

• statements A and B are FALSE

A. Parallel circuit means that there is the same potential difference in each capacitor.

B. Parallel circuit means that charges in each capacitor differ from one another.

• statement A alone is TRUE

• statement B alone is TRUE

• statements A and B are TRUE

• statements A and B are FALSE

What term is used to measure the storing ability of a capacitor?

What type of quantity is used in electromagnetism that determines the energy stored in the capacitor per given volume?

The capacitance of a capacitor is not affected by the orientation or geometry of the plates and the dielectric constant of the material between them

• TRUE

• FALSE

A. All electric filed lines generated by the charges on the plates of the capacitor can pass through the dielectric.

B. The higher the electric field lines passing through the plate capacitor, the lesser the potential difference.

• statement A alone is TRUE

• statement B alone is TRUE

• statements A and B are TRUE

• statements A and B are FALSE

Parallel plate capacitor consists of two parallel metal plates laced near one another but not touching. Dielectric is an insulating material that is inserted to fill the region between the conductors or plates.

• TRUE

• FALSE