« previous next »

Author Question: Two parallel square metal plates that are 1.5 cm apart and 22 cm on each side carry equal but ... (Read 70 times)

dalyningkenk

  • Hero Member
  • *****
  • Posts: 598
on: Jul 29, 2018
Two parallel square metal plates that are 1.5 cm apart and 22 cm on each side carry equal but opposite charges uniformly spread out over their facing surfaces.
 
  How many excess electrons are on the negative surface if the electric field between the plates has a magnitude of 18,000 N/C? (k = 1/40 = 9.0  109 N  m2/C2, e = 1.6  10-19 C)

Question 2

The inductor in a radio receiver carries a current of amplitude 200 mA when a voltage of amplitude 2.40 V is across it at a frequency of 1400 kHz. What is the value of the inductance?
 
  A) 1.43 H B) 4.42 H C) 1.97 H D) 1.36 H E) 9.20 H


Jsherida

  • Sr. Member
  • ****
  • Posts: 314
Reply #1 on: Jul 29, 2018
Answer to Question 1

4.8  10-19 electrons

Answer to Question 2

D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

dalyningkenk

  • Hero Member
  • *****
  • Posts: 598
Reply #2 on: Jul 29, 2018
TY


Jsherida

  • Sr. Member
  • ****
  • Posts: 314
Reply #3 on: Jul 29, 2018
You're welcome


« previous next »
 

Did you know?

There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

Did you know?

Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

Did you know?

Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

Did you know?

The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.

Did you know?

Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.

Methicilli ...
Photograph taken during a laparoscopic procedure. The fundus of the uterus is visible below the prob Photograph taken during a laparoscopic procedure. The fundus of the uterus is visible below the prob
Color enhanced X-ray showing a pacemaker implanted in the left side of the chest and the electrode w Color enhanced X-ray showing a pacemaker implanted in the left side of the chest and the electrode w
Insert the needle with the beveled side up. Keep the angle low, 10 to 30 degrees. Insert the needle with the beveled side up. Keep the angle low, 10 to 30 degrees.
viable surface sampling using contact plates viable surface sampling using contact plates
Sponge bob square pants kindergarten drawing Sponge bob square pants kindergarten drawing
Video: Lower Limb Arteries Animation

For a complete list of videos, visit our video library