« previous next »

Author Question: How long will it take a charged 80-mF capacitor to lose 20 of its initial energy when it is allowed ... (Read 59 times)

javeds

  • Hero Member
  • *****
  • Posts: 570
on: Jul 28, 2018
How long will it take a charged 80-mF capacitor to lose 20 of its initial energy when it is allowed to discharge through a 45-W resistor?
 a. 0.92 ms
  b. 0.64 ms
  c. 0.40 ms
  d. 0.19 ms
  e. 0.80 ms

Question 2

In an RC circuit, what fraction of the final energy is stored in an initially uncharged capacitor after it has been charging for 3.0 time constants?
 a. 0.84
  b. 0.90
  c. 0.75
  d. 0.60
  e. 0.03


ergserg

  • Sr. Member
  • ****
  • Posts: 338
Reply #1 on: Jul 28, 2018
Answer to Question 1

C

Answer to Question 2

B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

javeds

  • Hero Member
  • *****
  • Posts: 570
Reply #2 on: Jul 28, 2018
Both answers were spot on, thank you once again


ergserg

  • Sr. Member
  • ****
  • Posts: 338
Reply #3 on: Jul 28, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

Did you know?

Vital signs (blood pressure, temperature, pulse rate, respiration rate) should be taken before any drug administration. Patients should be informed not to use tobacco or caffeine at least 30 minutes before their appointment.

Did you know?

People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.

Did you know?

Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.

Did you know?

Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.

Long-Term Potentiation and Long-Term Depression Long-Term Potentiation and Long-Term Depression
Kinetic versus Potential Energy Kinetic versus Potential Energy
The first five reactions constitute the energy-investment phase of glycolysis The first five reactions constitute the energy-investment phase of glycolysis
Reactions 6–10: The Energy Generation Phase Reactions 6–10: The Energy Generation Phase
Reaction 1: The Initial Dehydrogenation Reaction 1: The Initial Dehydrogenation
Energy Transfer Energy Transfer
Video: Darwin's Observation (Fossils, Galapagos Islands & Africa ) and Natural Selection (Adaptive Traits)

For a complete list of videos, visit our video library