Answer:
[tex]E=54V/cm[/tex]
[tex]\Delta V=496.8V[/tex] between the plates.
Explanation:
The equation for change of voltage between two points separated a distance d inside parallel conducting plates (which have between them constant electric field) is:
[tex]\Delta V=Ed[/tex]
So to calculate our electric field strength we use the fact that the potential 8.8 cm from the zero volt plate is 475 V:
[tex]E=\frac{\Delta V}{d}=\frac{475 V}{8.8cm}=54V/cm[/tex]
And we use the fact that the plates are 9.2cm apart to calculate the voltage between them:
[tex]\Delta V=Ed=(54V/cm)(9.2cm)=496.8V[/tex]