An isolated conducting sphere can be considered as a capacitor. The electric potential energy in (nJ) stored in an

isolated conducting sphere with a radius a= 7.5 cm and has a charge q = 3.8 nC  is:

capacitor has a capacitance of 16.4 µF and a

charge of 6.5 mC. The capacitor is disconnected from the battery and a dielectric

material of dielectric constant 2.7 is used to fill the space between the

plates.The electric potential difference between its plates (in V) after inserting the

dielectric material is:

A parallel-plate capacitor consists of two

parallel, square plates that have dimensions 5 cm by 5 cm. If the plates

are separated by 3.7 mm, and the space between them is filled with teflon, what

is the capacitance of this capacitor (in pF)? 

(The dielectric constant for teflon is

2.1, and ε

A 7.9 μF and a 3.5 μF capacitors are connected in series and a potential difference 8.9 V  is applied across the combination. The potential difference across the 7.9 μF capacitor is:

Each of the three 8.6 μF capacitors shown is initially uncharged. How many coulombs of charge pass through the ammeter A after the switch S is closed?

In the shown Figure, what is the net electric potential (in ) at point P due to the four particles if  at infinity, , and ?

The figure shows two arcs of a circle of a radius R=0.6 m on which charges Q₁=39.2 nC and Q₂=-12.5 nC have been spread uniformly. What is the value of the electric potential (in V) at the center of the circle?

 

A uniform electric field E=9.1 V/m crosses the x -axis at a 40^ο angle. Point B lies on the x-axis 5 cm to the right of the origin A. What is the potential difference V_B-V_A (in Volts)? 

A rod of length  located along the x axis has a uniform linear charge density . Find the electric potential at a point   located on the   axis a distance from the rod end as shown.   

Hint, assume that the potential is zero at infinity.

A conducting sphere of radius 12 cm carries a charge of +35 μC. The potential (relative to infinity) due to this sphere at a point 76 cm from its center is: