Author Question: An air-filled parallel-plate capacitor is connected to a battery and allowed to charge up. Now a ... (Read 93 times)

Tazate

  • Hero Member
  • *****
  • Posts: 532
An air-filled parallel-plate capacitor is connected to a battery and allowed to charge up. Now a slab of dielectric material is placed between the plates of the capacitor while the capacitor is still connected to the battery.
 
  After this is done, we find that
  A) the energy stored in the capacitor had decreased.
  B) the voltage across the capacitor had increased.
  C) the charge on the capacitor had increased.
  D) the charge on the capacitor had not changed.
  E) None of these choices is true.

Question 2

If the electric potential in a region is given by V(x) = 6/x2, the x component of the electric field in that region is
 
  A) -12x-3.
  B) -6x.
  C) 12x-3.
  D) 12x.
  E) 6x.



dlook33

  • Sr. Member
  • ****
  • Posts: 344
Answer to Question 1

Answer: C

Answer to Question 2

Answer: C



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

Tazate

  • Hero Member
  • *****
  • Posts: 532
Both answers were spot on, thank you once again



dlook33

  • Sr. Member
  • ****
  • Posts: 344

 

Did you know?

It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

Did you know?

As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.

Did you know?

Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

Did you know?

Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

Did you know?

About 80% of major fungal systemic infections are due to Candida albicans. Another form, Candida peritonitis, occurs most often in postoperative patients. A rare disease, Candida meningitis, may follow leukemia, kidney transplant, other immunosuppressed factors, or when suffering from Candida septicemia.

For a complete list of videos, visit our video library