How Does Partial Insertion of a Dielectric Affect Capacitor Voltage?

  • Thread starter Thread starter vthang05
  • Start date Start date
  • Tags Tags
    Circuit
Join the discussion
Registration is free. Ask a follow-up in this thread, or start your own.
1 reply · 3K views
vthang05
Messages
1
Reaction score
0
A parallel-plate capacitor with only air between the plates is charged by connecting it to a battery. The capacitor is then disconnected from the battery, without any of the charge leaving the plates.

Part A:
A voltmeter reads 46.0 V when placed across the capacitor. When a dielectric is inserted between the plates, completely filling the space, the voltmeter reads 15.0 V. What is the dielectric constant of this material?

Part B:
What will the voltmeter read if the dielectric is now pulled partway out so it fills only one-third of the space between the plates?

I know how to do part A using K = Vo/V, But i do not know how to work the problem if it involve partial dielectric.Any helps or hints would be great thanks.
 
Physics news on Phys.org