Question

Two squares of copper are separated by 6 x 10^{-6}
meters and have a capacitance of 8 nF. (Only air is between the
squares.) A) What is the area of each plate? The plates
are connected to a 120 V power source. B) What is the charge on the
plates? C) What is the **potential energy** stored in
the capacitor? D) What is the magnitude of the electric field
between the plates? The capacitor is now removed from the 120 V
source and replaced with a 1000 Ohm resistor. E) How much current
flows through the circuit? f) How much power is being dissipated by
the resistor? If the resistor is made of copper (ρ = 1.68 x
10^{-8} Ωm) of length 0.050 m. G) What is the cross
sectional area of the resistor?

Answer #1

An air-filled parallel-plate capacitor of capacitance 12 nF has
a 9 V battery connected
across it.
a) If the battery is first disconnected and then a dielectric of K
= 3 is inserted between
the plates, what is the new capacitance, new charge, and new
potential difference on the
capacitor?
b) How much work is required to remove the dielectric in part
a?
2) A nickel wire of length 10 m and radius 2 mm has a potential
difference of...

1) What is the capacitance of an empty parallel-plate capacitor
with metal plates that each have an area of 1.00 m 2, separated by
1.00 mm?
We assume an answer in nF.
2) How much charge is stored in this capacitor if a voltage of
3.00 × 10 3 V is applied to it?
We assume an answer in μ C.

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...

16.3 Capacitance
57. MC
A capacitor is first connected to a 6.0-V battery and then
disconnected and connected to a 12.0-V battery. How does its
capacitance change: (a) It increases, (b) it decreases, or (c) it
stays the same?
58. MC
A capacitor is first connected to a 6.0-V battery and then
disconnected and connected to a 12.0-V battery. How does the charge
on one of its plates change: (a) It increases, (b) it decreases, or
(c) it stays the same?
59. MC...

The hospital you work for uses a defibrillator that has a single
capacitor with a capacitance of 10-6 F. When it is about
to be used, the defibrillator is charged to a voltage of 4000
V.
a) How much charge is stored on the defibrillator ‘s capacitor when
it has been fully charged?
b) If you were to connect an additional 3 x 10-6 F capacitor in
parallel with the original 10-6 F capacitor in the defibrillator,
what would be...

Choose true or false.
True False Two straight wires carry electric currents in the
positive directions along the x- and y-axes. In
the first quadrant, the magnetic field is directed out of the plane
of the paper in some places, into the plane of the paper in other
places, and in some places it is zero.
True False A parallel-plate capacitor has a
capacitance of 10 mF and is charged with a 20 V
power supply. The power supply is then...

Part B; Questions 6-8: For this part show
your work, steps and calculations. Just an answer
that results from a multi step operation on your calculator
is NOT sufficient. Solution lacking detailed steps
won’t be fully credited.
6. A circular
conducting loop with area A = 0.092 m2 is placed in a
uniform magnetic field of 0.44 T with the plane of the loop
perpendicular to the magnetic field as shown. The loop is rotated
180o about the axis in 0.25...

1.
You need to insulate the wall with the below two
materials. If you have 5 inch-thick plywood, how thick the softwood
needs to be to meet the R-value of 9?
The following are R-values of common building insulation
materials.
**Units of R-value are ft2-hr-ºF/Btu
Soft
wood
R = 1 ( /1.25 inch )**
Plywood
R = 0.62 ( /0.5 inch)**
Group of answer choices
7.25 in
6.0 in
4.75 in
8.5 in
3.5 in
2.
If a 10 ohm...

1,The same voltage is applied between the plates of two
different capacitors. When used with capacitor A, this voltage
causes the capacitor to store 15 μC of charge and 3.4 x 10-5 J of
energy. When used with capacitor B, which has a capacitance of 7.9
μF, this voltage causes the capacitor to store a charge that has a
magnitude of qB. Determine qB.
2,The membrane that surrounds a certain type of living cell has
a surface area of 6.0...

1) 2 point charges are separated by a distance of 8 cm. The left
charge is 48 mC and the right charge is -16mC. Using a full sheet
of paper: draw the 2 charges separated by 8cm, centered in the
sheet. (if you are missing a ruler estimate 8cm as ⅓ a paper sheet
length). [6] a) Draw field lines to indicate the electric fields
for this distribution. [4] b) Draw 3 equipotential surfaces, 1
each, that pass: -Through the...

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