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
horsena [70]
1 year ago
7

A capacitor is constructed of two large, identical, parallel metal plates separated by a small distance d. A battery fully charg

es the capacitor and is then disconnected. If, instead of separating the plates, the empty space between the plates is filled with a slab of insulating material that has a dielectric constant κ= 2, which of the following correctly describes the change, if any, of the voltage across the capacitor, the electric field between the plates, and the energy stored in the capacitor? 1) Voltage halvesElectric field halves Energy halves 2. Voltage halves Electric field halves Energy does not change 3. Voltage does not change Electric field does not change Energy halves 4. Voltage does not changeElectric field halves Energy halves 5. Voltage does not change Electric field does not change Energy does not change
Physics
1 answer:
Alja [10]1 year ago
5 0

The capacitance of a capacitor of a parallel plate is given by:

C=\frac{kA\cdot\epsilon_o}{d}

Where:

\begin{gathered} \epsilon_o=_{\text{ }}Vacuum_{\text{ }}permittivity \\ k=_{\text{ }}Dielectric_{\text{ }}constant=2 \\ A=_{\text{ }}Area_{\text{ }}of_{\text{ }}the_{\text{ }}plates \\ d=_{\text{ }}distance_{\text{ }}betwen_{\text{ }}the_{\text{ }}plates \end{gathered}

We also know:

\begin{gathered} Q=\frac{q}{V} \\ so\colon \\ \frac{q}{V}=\frac{kA\cdot\epsilon_o}{d} \\ V=\frac{qd}{kA\cdot\epsilon_o} \\ if \\ k=2 \\ V=\frac{1}{2}(\frac{qd}{kA\cdot\epsilon_o}) \end{gathered}

As we can see the voltage halves

And since:

\begin{gathered} E=\frac{V}{d} \\ W=qV \end{gathered}

We can conclude that electric field and also the energy halve

You might be interested in
The answer using the graphical method and analytical method of vector addition will always be.
Alex17521 [72]

The answer using the graphical method and analytical method of vector addition will always be

C. Same

Analytic method means adding vectors (x₁,y₁) and (x₂,y₂) give (x₁+x₂,y₁+y₂)

Example: Addition of (2,3) and (1,1) gives (3,4)

Solving it graphically will also give (3,4)

4 0
4 years ago
The motion of a car on a position time graph is represent with a horizontal line . What does this indicate about the cars motion
siniylev [52]
It indicates that car is at rest at all time (t) :-) Hope it helped you. ✌
5 0
3 years ago
Read 2 more answers
Andrea is investigating how increasing the concentration of sugar affects the boiling point of the solution. What would be the b
NNADVOKAT [17]

An increase in the concentration of sugar in a solution leads to the increase in boiling point of the solution.

<h3>What is boiling point?</h3>

Boiling point of a solution is that pressure exerted on a liquid by its surrounding is equal to the vapour pressure of the liquid.

When there is an increase in concentration of solute, more space will be occupied in the fluid leading to an increase in the boiling point of the fluid.

Therefore, An increase in the concentration of sugar in a solution leads to the increase in boiling point of the solution.

Learn more about boiling point here:

brainly.com/question/40140

#SPJ1

5 0
3 years ago
A yo‑yo with a mass of 0.0800 kg and a rolling radius of =2.70 cm rolls down a string with a linear acceleration of 5.70 m/s2.
N76 [4]

Explanation:

Given that,

Mass, m = 0.08 kg

Radius of the path, r = 2.7 cm = 0.027 m

The linear acceleration of a yo-yo, a = 5.7 m/s²

We need to find the tension magnitude in the string and the angular acceleration magnitude of the yo‑yo.

(a) Tension :

The net force acting on the string is :

ma=mg-T

T=m(g-a)

Putting all the values,

T = 0.08(9.8-5.7)

= 0.328 N

(b) Angular acceleration,

The relation between the angular and linear acceleration is given by :

\alpha =\dfrac{a}{r}\\\\\alpha =\dfrac{5.7}{0.027}\\\\=211.12\ m/s^2

(c) Moment of inertia :

The net torque acting on it is, \tau=I\alpha, I is the moment of inertia

Also, \tau=Fr

So,

I\alpha =Fr\\\\I=\dfrac{Fr}{\alpha }\\\\I=\dfrac{0.328\times 0.027}{211.12}\\\\=4.19\times 10^{-5}\ kg-m^2

Hence, this is the required solution.

3 0
3 years ago
If 7 ocean waves pass a point in 4 minutes, then the frequency of the wave is:
kirza4 [7]

Explanation:

everything can be found in the picture.

sorry I don't know why your answers to not correspond but my method is correct

6 0
3 years ago
Other questions:
  • A crest in a transverse wave corresponds to a in a longitudinal wave
    5·2 answers
  • Does laser refract through water or reflect ?
    12·2 answers
  • It is recommended that you said at least how many inches away from the airbag ?
    5·1 answer
  • Heights of men on a baseball team have a​ bell-shaped distribution with a mean of 166 cm 166 cm and a standard deviation of 5 cm
    15·1 answer
  • Which career field is an applied science?
    11·2 answers
  • A piece of wire is bent to form a circle with radius r. It has a steady current I flowing through it in a counterclockwise direc
    15·1 answer
  • Rhea kicks a soccer ball at 13km/h to Sean after kicking the ball the speed of the soccer ball from Rhea reference frame is 13km
    5·1 answer
  • A comet is cruising through the solar system at a speed of 50,000 kilometers per hour for 4 hours time. What is the total distan
    12·1 answer
  • Question 6 of 10
    7·2 answers
  • How far would the moon be if its mass was doubled
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!