Question

The plates of a spherical capacitor have radii of 11.60 mm and 12.70 mm. Calculate the capacitance of the capacitor.

What must be the plate area of a parallel-plate capacitor with the same plate separation and capacitance?

If a 12.90 *V* potential is applied to the parallel-plate
capacitor, calculate the magnitude of the electric field between
the plates.

Calculate the energy density in the parallel-plate capacitor.

Answer #1

**C = 4pieo (r)**

**C = 4*3.14* 8.85e-12 * (12.7-11.60mm)**

**C = 0.122 pF
-----------------------------------------------**

**use C = eoA/d**

**A = 0.122e-12* (12.7-11.60)mm/8.85 e-12**

**A = 1.519 *10^-5 m^2
----------------------------------------------------**

**E = V/d**

**E = 12.90/(12.7-11.6)mm**

**E = 1.1727*10^4 N/C or V/m
-------------------------------------------
energy density u = 0.5 eo E^2**

**u = 0.5 * 8.85e-12 * 1.1727*1.1727 *10^8**

**u = 6.08*10^-4 J/m^3
----------------------------------------**

The plates of a spherical capacitor have radii 49.2 mm and 51.4
mm. (a) Calculate the capacitance. (b) What must be the plate area
of a parallel-plate capacitor with the same plate separation and
capacitance?

A parallel-plate air-filled capacitor having area 58
cm2 and plate spacing 0.89 mm is charged to a potential
difference of 520 V. Find (a) the capacitance,
(b) the magnitude of the charge on each plate,
(c) the stored energy, (d) the
electric field between the plates, (e) the energy
density between the plates.

A parallel-plate air-filled capacitor having area 60
cm2 and plate spacing 4.0 mm is charged to a potential
difference of 450 V. Find
(a) the capacitance,__13.3 pF
(b) the magnitude of the charge on each plate,
___5.985nC
(c) the stored energy,
_____µJ
(d) the electric field between the plates, and
_112500_ V/m
(e) the energy density between the plates.
_(e) the energy density between the plates.
show all work pleas

An air-filled capacitor consists of two parallel plates, each
with an area of 7.60 cm2, separated by a distance of
1.40 mm. If a 22.4-V potential difference is applied to these
plates, calculate the following.
(a) the electric field between the plates
magnitude
kV/m
direction
---Select--- from the positive plate to the negative plate from
the negative plate to the positive plate
(b) the capacitance
pF
(c) the charge on each plate

An air-filled capacitor consists of two parallel plates, each
with an area of 7.60 cm2, separated by a distance of
1.70 mm. A 15.0-V potential difference is applied to these
plates.
(a) Calculate the electric field between the plates.
kV/m
(b) Calculate the surface charge density.
nC/m2
(c) Calculate the capacitance.
pF
(d) Calculate the charge on each plate.
pC

A parallel-plate air capacitor is made by using two plates 18 cm
square, spaced 6.0 mm apart. It is connected to a 24-V battery.
(a) What is the capacitance?
________F
(b) What is the charge on each plate?
_______ C
(c) What is the electric field between the plates?
__________ V/m
(d) What is the energy stored in the capacitor?
________ J
(e) If the battery is disconnected and then the plates are pulled
apart to a separation of 12...

An air-filled capacitor consists of two parallel plates, each
with an area of 7.6 cm2, separated by a distance of 2.20
mm.
(a) If a 18.0 V potential difference is applied to these plates,
calculate the electric field between the plates.
kV/m
(b) What is the surface charge density?
nC/m2
(c) What is the capacitance?
pF
(d) Find the charge on each plate.
pC

. An air-filled parallel-plate capacitor has plates of area 2.45
cm2 separated by 1.25 mm. The capacitor is connected to
a 9.0 V battery. (a) Find the value of its capacitance. (b) What is
the charge on the capacitor? (c) What is the magnitude of the
uniform electric field between the plates?

1.) A parallel-plate capacitor has circular plates of
7.2 cm radius and 1.5 mm separation. Calculate the
capacitance.
1.03x10^-10F Submit Answer Incorrect. Tries 4/5 Previous
Tries
2.) What charge will appear on the plates if a potential
difference of 6 V is applied?

An air-filled parallel-plate capacitor has plates of area 0.47
cm2 separated by 4.1 mm. The capacitor is conected to a
12-V battery.
(a) Find the value of its capacitance
0.355 F
0.152 F
0.072 F
0.101 F
(b) What is the charge on the capacitor?
0.008 C
1.217 C
1.826 C
12.00 C
(c) What is the magnitude of the uniform electric field between
the plates?
3.42 N/C
2,926.83 N/C
1,463.41 N/C
12 N/C
(d) Find the magnitude of the charge density on each plate.
1.363 C/m2
7.382...

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