Question

Two parallel, coaxial circular disks 1 and 2, each of area 21.8 cm^2, are separated by a small distance 0.8 mm. The disks 1 and 2 are charged uniformly with charge -4 nC and 1 nC, respectively. How much work is required for an external force to move a proton located between and far from the edges of the disks very slowly from a point very close to disk 1 to one very close to disk 2?

Answer #1

Two 10-cm-diameter charged disks face each other, 17 cm apart.
The left disk is charged to - 50 nC and the right disk is charged
to + 50 nC
By what distance has the proton been deflected sideways when it
reaches the far edge of the capacitor? Assume the field is uniform
inside the capacitor and zero outside the capacitor.

A parallel plate capacitor with an area of 300 cm 2 is separated
by a
distance of 2 mm in air or vacuum is charged by a battery of 12
volts. Find a) the capacitance
of the system, b) the charge on the plates and c) the energy
stored.

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 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

1.) A parallel-plate capacitor is constructed from two circular
plates with diameter 5.0 cm separated by 0.20 mm. What charge will
collect on the plates if the capacitor is connected to a potential
difference of 35.0 V?
2.)The capacitor from the previous problem is now disconnected
from the voltage source. The separation between the capacitor
plates is quadrupled and an insulator is inserted between the
plates. The voltage between the plates is measured to be 68.3 V.
Find the dielectric...

A.) Two identical closely spaced circular disks form a
parallel-plate capacitor. Transferring 2.5×109 electrons
from one disk to the other causes the electric field strength
between them to be 1.0×105 N/C .
What are the diameters of the disks? Express your answer to two
significant figures and include the appropriate units.
B.) At a distance r from a point charge, the electric
potential is 4600 V and the magnitude of the electric field is
2.0×105 V/m .
- What is...

Two large parallel plates each have an area of 250 cm^2 . When
the two plates are separated by air, the system has a capacitance
of 2.1 nF . The first plate has a charge of +20 nC and the second
plate has a charge of −20 nC .
(a) What is the separation between the two plates?
(b) What is the potential difference between the two plates?
Which plate has a larger potential?
(c) What is the magnitude and...

(part 1) An air-filled capacitor consists of two parallel
plates, each with an area of 3.95 cm2 , separated by a distance of
2.76 mm . A 17.7 V potential difference is applied to these plates.
Find the magnitude of the electric field between the plates. The
permittivity of free space is 8.8542 × 10−12 C 2 /N · m2 . Answer
in units of kV/m.
(part 2) Find the capacitance. Answer in units of pF.
(part 3) Find the...

1. What potential difference is needed to accelerate a He+ ion
(charge +e, mass 4u) from rest to a speed of 1.1×106 m/s
?
2. Two 2.00 cm × 2.00 cm plates that form a parallel-plate
capacitor are charged to ± 0.708 nC .
a) What is the electric field strength inside the capacitor if
the spacing between the plates is 1.30 mm ?
b)What is potential difference across the capacitor if the
spacing between the plates is 1.30 mm...

PLEASE ANSWER ALL QUESTIONS. ROUND ANSWERS TO THE FOURTH DECIMAL
PLACE.
1). Two circular metal plates, separated by a distance 8.85 mm
forms 41 nF capacitance. The space between the plates are filled
with Tefflon material with epsilon_r = 2.2. Calculate the area of
each plate.
2). In the following circuit, C1=8.0 F, C2=2*8.0 F, C3=2*8.0 F,
C4=2*4.5 F, and C5=3*4.5. Calculate the equivalent capacitance in
the circuit.
3). A parallel plate capacitor is connected with a 1,596 volt
battery...

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