1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
dlinn [17]
3 years ago
11

Air "breaks down" when the electric field strength reaches 3 × 106 n/c, causing a spark. A parallel-plate capacitor is made from

two 5.5 cm × 5.5 cm electrodes.
Physics
2 answers:
Lera25 [3.4K]3 years ago
3 0

Electric field between the plates of parallel plate capacitor is given as

E = \frac{Q}{A\epsilon_0}

here area of plates of capacitor is given as

A = 0.055 * 0.055

A = 3.025 * 10^{-3}

also the maximum field strength is given as

E = 3 * 10^6 N/C

now we will plug in all data to find the maximum possible charge on capacitor plates

3 * 10^6 = \frac{Q}{3.025 * 10^{-3}*8.85 * 10^{-12}}

Q = 8.03 * 10^{-8} C

so the maximum charge that plate will hold will be given by above

victus00 [196]3 years ago
3 0
<h2>Complete Question:</h2>

Air "breaks down" when the electric field strength reaches 3×10⁶N/C, causing a spark. A parallel-plate capacitor is made from two 5.5cm × 5.5cm plates.  

How many electrons must be transferred from one disk to the other to create a spark between the disks?

<h2>Answer:</h2>

5.02 x 10¹¹

<h2>Explanation:</h2>

The electric field E of a parallel-plate capacitor is given by;

E = Q / (A ε₀)        --------------------------(i)

Where;

Q = the charge on the plates

A = Area of any of the plates

ε₀ = electric constant =  8.85 x 10⁻¹²F/m

<em>From the question;</em>

E = 3 x 10⁶N/C

A = 5.5cm x 5.5cm = 30.25cm² = 0.003025m²

<em>Substitute these values into equation (i) as follows;</em>

3 x 10⁶ = Q / (0.003025 x 8.85 x 10⁻¹²)

<em>Solve for Q;</em>

Q = 3 x 10⁶ x 0.003025 x 8.85 x 10⁻¹²

Q = 8.03 x 10⁻⁸

The charge on the capacitor is therefore, 8.03 x 10⁻⁸C

Now, to get the number of electrons that must be transferred from one disk to the other to create a spark between the disks, we use the relation;

Q = N x E               ----------------------(ii)

Where;

Q = the charge = 8.03 x 10⁻⁸C                            [as calculated above]

N = the number of electrons

E = the charge of one electron = 1.6 x 10⁻¹⁹C    [a known value]

<em>Substitute these values into equation (ii) as follows;</em>

8.03 x 10⁻⁸ = N x 1.6 x 10⁻¹⁹

<em>Solve for N;</em>

N = [8.03 x 10⁻⁸] / [1.6 x 10⁻¹⁹]

N = 5.02 x 10¹¹

Therefore, the number of electrons that must be transferred from one disk to the other to create a spark between the disks is 5.02 x 10¹³

You might be interested in
As the concentration of a solute in a solution increases, the freezing point of the solution ________ and the vapor pressure of
kykrilka [37]

Answer:

As the concentration of a solute in a solution increases, the freezing point of the solution <u><em>decrease </em></u>and the vapor pressure of the solution <em><u>decrease </u></em>.

Explanation:

Depression in freezing point :

\Delta T_f=K_f\times m

where,

\Delta T_f =depression in freezing point =  

K_f = freezing point constant  

m = molality  ( moles per kg of solvent) of the solution

As we can see that from the formula that higher the molality of the solution is directly proportionate to the depression in freezing point which means that:

  1. If molality of the solution in high the depression in freezing point of the solution will be more.
  2. If molality of the solution in low the depression in freezing point of teh solution will be lower .

Relative lowering in vapor pressure of the solution is given by :

\frac{p_o-p_s}{p_o}=\chi_{solute}

p_o = Vapor pressure of pure solvent

p_s  = Vapor pressure of solution

\chi_{solute} = Mole fraction of solute

p_s\propto \frac{1}{\chi_{solute}}

Vapor pressure of the solution is inversely proportional to the mole fraction of solute.

  1. Higher the concentration of solute more will the be solute's mole fraction and decrease in vapor pressure of the solution will be observed.
  2. lower the concentration of solute more will the be solute's mole fraction and increase in vapor pressure of the solution will be observed.
8 0
3 years ago
An ellipse has two focal points. One of the focal points is the _____. earth, moon, or Sun
Rasek [7]

An ellipse has two focal points. One of the focal points is the <u><em>Sun</em></u>.

Because they planets move faster when they are around the sun.

6 0
3 years ago
Read 2 more answers
A ball is thrown horizontally from the top of a building 0.10 km high. The ball strikes the ground at a point 65 m horizontally
stepladder [879]

Answer:  well the time it takes to fall 100m is the same time it takes to travel 65m horizontally.  

The time to fall vertically, t is sqrt(2d/g). [this comes from d = 1/2at^2]  

so t = sqrt(2*100/9.8) = 4.52s.  

The vertical speed at that time is g*t = 9.8*4.52 = 44.3m/s  

The horizontal speed is the horizontal distance over the same 4.52s, = 65/4.52 = 14.4m/s.  

so the final velocity is = sqrt(44.3^2 + 14.4^2) = 46.6m/s

Explanation: yes

6 0
3 years ago
Read 2 more answers
The man rolls the cupboard at a steady speed from the lorry to the house. The friction force in the wheels is 40 N. State the fo
tamaranim1 [39]

Answer:

40N

Explanation:

Using the newton's second law of motion

\sum Fx = max

Fm - Ff = max

Fm is the applied force

Ff is the frictional force

m is the mas of the cupboard

ax is the acceleration

Since the speed from the lorry is steady, ax = 0m/s^2

Also Ff = 40N

Substitute into  the formula;

Fm - 40 = m(0)

Fm - 40 = 0

Add 40 to both sides

Fm - 40 + 40 = 0 + 40

Fm = 40N

Hence the force with which the man applied to push is 40N

4 0
3 years ago
PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!! I CANNOT RETAKE THIS AND I NEED ALL CORRECT ANSWERS ONLY!!!
emmainna [20.7K]

Bar magnets have 2 poles. I think. Answer: first choice

6 0
3 years ago
Read 2 more answers
Other questions:
  • Can gravity be considered a force? Why or Why not?
    14·2 answers
  • :) What is practical machine? what is the reda<br>tion between MA and VR in a practical<br>machine?​
    5·1 answer
  • 13. What's most intriguing about Titan's atmosphere?
    11·1 answer
  • What Converts sound to a signal in a telephone
    15·1 answer
  • For hundreds of years humans have been adding chemicals and other pollutants to the earths water supply. Can earths water ever b
    11·1 answer
  • Blood cell : ____________ :: bacteria : _________________
    15·1 answer
  • A cylinder of mass 8.0 kg rolls without slipping on a horizontal surface. At a certain instant its center of mass has a speed of
    9·1 answer
  • A block slides forward 4.73 m while being pulled back by a 39.7 N force at 142° from the direction of motion. How much work does
    13·1 answer
  • How have scientists played an important role in history?
    13·2 answers
  • 26 Select the correct answer. What happens when two polarizers are placed in a straight line, one behind the other? They allow l
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!