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
dimulka [17.4K]
3 years ago
7

A spherical capacitor is formed from two concentric spherical conducting shells separated by vacuum. The inner sphere has a radi

us of ra = 12.3 cm , and the outer sphere has a radius of rb = 15.1 cm . A potential difference of 120 V is applied to the capacitor.
(a) What is the capacitance of the capacitor?
(b) What is the magnitude E1 of the electric field E? at radius r= 12.8cm, just outside the inner sphere?
(c) What is the magnitude of E? at r= 14.7cm, just inside the outer sphere?
Physics
1 answer:
Svetlanka [38]3 years ago
8 0

Answer: a) 73.41 10^-12 F; b)4.83* 10^3 N/C; c) 3.66 *10^3 N/C

Explanation: To solve this problem we have to consider the following: The Capacity= Charge/Potential Difference

As we know the capacity is  value that depend on the geometry of the capacitor, in our case two concentric spheres.

So Potential Difference between the spheres is given by:

ΔV=-\int\limits^a_b {E} \, dx

Where E = k*Q/ r^2

so we have \int\limits^a_b {K+Q1/r} \, dr

then

Vb-Va=k*Q(1/b-1/a)=kQ (ab/b-a)

Finally using C=Q/ΔV=ab/(k(b-a))

To caclulate the electric firld we first obtain the charge

Q=ΔV*C=120 V*73.41 10^-12 F=8.8 10^-9 C

so E=KQ/r^2 for both values of r

r=12.8 cm ( in meters)

r2=14.7 cm

E(r1)=4.83* 10^3 N/C

E(r2)=3.66 *10^3 N/C

You might be interested in
1. Which of the following materials would likely create the strongest, most stable slope?
defon

Answer:D

Explanation:

4 0
3 years ago
Read 2 more answers
A circuit contains two resistors in series. The voltage drop across the first is 10 V. The voltage drop across the second is als
Norma-Jean [14]

Hi there!

Voltage in a series can be expressed by the following:

V_T = V_1 + V_2

In words, the total voltage is equal to the sum of the individual voltage drops in a SERIES circuit.

We can solve for the total voltage:

V_T = 10 + 10 = \boxed{\text{ D. 20 V}}

6 0
2 years ago
If the angular frequency of the motion of a simple harmonic oscillator is doubled, by what factor does the maximum acceleration
Nataly_w [17]

Answer:

When we double the angular velocity the maximum acceleration (a_{max}) will changes by a factor of 4.

Explanation:

Given the angular frequency (\omega) of the simple harmonic oscillator is doubled.

We need to find the change in the maximum acceleration of the oscillator.

a_{max}=A\omega^2

Now, according to the problem, the angular frequency (\omega) got doubled.

Let us plug \omega=2\times \omega. Then the maximum acceleration will be a_{max'}

a_{max}=A\omega^2

a_{max'}=A(2\times \omega)^2\\a_{max'}=A\times 4\omega\\a_{max'}=4A\omega

a_{max'}=4a_{max}

We can see, when we double the angular velocity the maximum acceleration will changes by a factor of 4.

6 0
3 years ago
List at least 3 ways for you to represent your data graphically
yawa3891 [41]
1. circle graph
2. Bar graph
3. line graph

hope this helps
6 0
1 year ago
Read 2 more answers
At the beginning of a unit on forces, Ms. Alton is leading a class discussion asking her students
VMariaS [17]

Answer:

(iv), (v), (vi) would be incorrect.

Explanation:

(iv) Force isn't transferred from one colliding object to another, but momentum can be.

(v) An object doesn't stop immediately a force stops acting on it. Think of a thrown ball.

(vi) For an object not to move, it means that the net force on the object is zero, and not necessarily that there are no forces acting on the object. For example, an object could be pushed on one side, and be pushed on the other side with an equal force in the opposite direction. The forces would cancel each other and the net force would be zero.

The rest should be correct.

6 0
3 years ago
Other questions:
  • How many meters in 32 kilometers
    6·2 answers
  • Properties of dot product
    5·1 answer
  • Prehistory can be described as _____.
    8·1 answer
  • How are magnetic field lines and electric field lines alike
    5·1 answer
  • Use the periodic table to complete this equation that represents the process of nuclear fusion.
    8·3 answers
  • "A positively-charged particle is held at point A between two parallel metal plates. The plate on the left has a net positive ch
    7·1 answer
  • Complete the statement below with all that apply.<br><br> Average speed is what?
    15·2 answers
  • What is potential difference??. Please give a detailed explanation. ​
    10·1 answer
  • Smooth muscle is found mainly in
    9·1 answer
  • 8. in a hall experiment, a current of 25 a is passed through a long foil of ag, which is 0.1 mm thick and 3mm long. calculate th
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!