Question #7a264

Question

Question #7a264

1 Answer

Impact of this question

1995 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2017-02-26T09:42:14

$0.0025m$ , rounded to three decimal places.

Explanation:

Size of penny is $0.75$ inches ( $19.05$ mm) in diameter.
![wikimedia.org/wikipedia/commons]( useruploads.socratic.org )
Capacitance $C$ of a parallel plate capacitor as shown in the figure below is given by the expression
enter image source here

$C=(kepsilon_0A)/d$
where $epsilon_0=8.854xx10^-12Fcdot m^-1$ is permittivity of space and $k$ is relative permittivity of the dielectric material between the plates. $k=1$ for free space, $k>1$ for all media, $~~ 1$ for air.

Assuming that the pennies are kept in air, inserting given values we get
$10^-12=(8.854xx10^-12xx[pi(19.05/(2xx1000))^2])/d$
$d=8.854xxpi(19.05/(2xx1000))^2$
$d=0.0025m$ , rounded to three decimal places.

Science

Math

Humanities

... and beyond

Question #7a264

1 Answer

Explanation:

Related questions

Impact of this question