Question

Two 5.0−cm-diameter metal disks separated by a 0.69−mm-thick piece of Pyrex glass are charged to a potential difference of 1500 V. What is the surface charge density on the disk? Express your answer using two significant figures. Part B What is the surface charge density on the glass? Express your answer using two significant figures.

Answer 1

To find the surface charge density on the metal disks, we first need to find the charge on each disk. For the glass, as it is non-conducting, the surface charge density is the same as for the metal disks.

Step-by-step explanation:

To find the surface charge density on the metal disks, we first need to find the charge on each disk.

The formula to calculate the charge on a conducting disk is Q = σA, where Q is the charge, σ is the surface charge density, and A is the area of the disk.

Given that the diameter of each disk is 5.0 cm, the radius is 2.5 cm. So the area of each disk is A = πr^2.

Using the given potential difference of 1500 V, we can now calculate the surface charge density on the metal disks.

For the glass, since it is non-conducting, the charge distribution is uniform throughout the Pyrex glass. Therefore, the surface charge density on the glass is the same as the charge density on the metal disks.