Capacitance

The units of capacitance are equivalent to:

• J/C

• V/C

• $J^2$ /C

• $C^2$ / J

To charge a 1-F capacitor with 2C requires a potential difference of:

• 2V

• 0.2V

• 5V

• 0.5V

The capacitance of a parallel-plate capacitor is:

• proportional to the plate area

• proportional to the charge stored

• . independent of any material inserted between the plates

• proportional to the potential difference of the plates

The capacitance of a parallel-plate capacitor can be increased by:

• increasing the charge

• decreasing the charge

• . increasing the plate separation

• decreasing the plate separation

If both the plate area and the plate separation of a parallel-plate capacitor are halved, the capacitance is:

• doubled

• halved

• unchanged

• tripled

Pulling the plates of an isolated charged capacitor apart:

• increases the capacitance

• increases the potential difference

• does not affect the potential difference

• decreases the potential difference

If the charge on a parallel-plate capacitor is doubled:

• the capacitance is halved

• the capacitance is doubled

• the electric field is halved

• the electric field is doubled

The capacitance of a single isolated spherical conductor with radius R is proportional to:

• R

• $R^2$

• 1/R

• 1/ $R^2$

A battery is used to charge a series combination of two identical capacitors. If the potential difference across the battery terminals is V and total charge Q flows through the battery during the charging process then the charge on the positive plate of each capacitor and the potential difference across each capacitor are:

• Q/2 and V/2, respectively

• Q and V , respectively

• Q/2 and V , respectively

• Q and V/2, respectively

A battery is used to charge a parallel combination of two identical capacitors. If the potential difference across the battery terminals is V and total charge Q flows through the battery during the charging process then the charge on the positive plate of each capacitor and the potential difference across each capacitor are:

• Q/2 and V/2, respectively

• Q and V , respectively

• Q/2 and V , respectively

• Q and V/2, respectively