Question

what electrical field strength would store 21 J of energy in a .001
m radius sphere?

Answer #1

If the electric field inside a capacitor exceeds the dielectric
strength of the dielectric between its plates, the dielectric will
break down, discharging and ruining the capacitor. Thus, the
dielectric strength is at the maximum magnitude that the electric
field can have without breakdown occurring. The dielectric strength
of air is 3.0x106 V/m and that of neoprene rubber is 1.2x107 V/m. A
certain air gap parallel plate capacitor can store no more than
0.075 J of electrical energy before breaking...

A hollow, conducting sphere with an outer radius of 0.260 m and
an inner radius of 0.200 m has a uniform surface charge density of
+6.47 × 10−6 C/m2. A charge of -0.400 μC is now introduced into the
cavity inside the sphere.
a)What is the new charge density on the outside of the
sphere?
b)Calculate the strength of the electric field just outside the
sphere
c)What is the electric flux through a spherical surface just
inside the inner surface...

A hollow, conducting sphere with an outer radius of 0.260 m and
an inner radius of 0.200 m has a uniform surface charge density of
+6.37 × 10−6 C/m2. A charge of -0.700 μC is now introduced into the
cavity inside the sphere. a) What is the new charge density on the
outside of the sphere? b) Calculate the strength of the electric
field just outside the sphere. c) What is the electric flux through
a spherical surface just inside...

A solid, nonconducting sphere of radius R = 6.0cm is charged
uniformly with an electrical charge of q = 12µC. it is enclosed by
a thin conducting concentric spherical shell of inner radius R, the
net charge on the shell is zero.
a) find the magnitude of the electrical field
E1 inside the sphere (r < R) at the
distance r1 = 3.0 cm from the center.
b) find the magnitude of the electric field E2
outside the shell at the...

A laser pulse has an energy of 21 J and a beam radius of 2 mm.
The pulse duration is 15 ns and the energy density is uniformly
distributed within the pulse.
(a) What is the spatial length of the pulse?
m
(b) What is the energy density within the pulse?
kJ/m3
(c) Find the rms values of the electric and magnetic fields in the
pulse.
E0 = MV/m
B0 = T

The electric field at the surface of a charged, solid, copper
sphere with radius 0.230 m is 3700 N/C , directed toward the center
of the sphere. .
What is the potential at the center of the sphere, if we take
the potential to be zero infinitely far from the sphere?

1) A spherical shell with a radius of 0.500 m is uniformly
charged and generates an electric field. The field has a strength
of 7.50 N/C at a distance of 1.00 m from the center of the sphere.
(a) What is the strength of the field 2.00 m from the center of the
sphere? (b) What is the strength of the field 10.0 m from the
center of the sphere? (c) What is the strength of the field inside
the...

A sphere of radius 0.500 m, temperature 27.0 oC and emissivity
0.850 is located in an environment of temperature 77.0 oC. At what
rate does the sphere (a) emit and (b) absorb thermal radiation? (c)
What is the sphere’s net rate of energy exchange (J/s)?

Find the gravitational field g(r)
anywhere inside of a uniform sphere of mass M and radius R.

An electron is initially at rest in a uniform electric field
having a strength of 1.95 × 106 V/m. It is then released
and accelerated by the presence of the electric field.
What is the change in the electron’s kinetic energy, in
kiloelectron volts, if it travels over a distance of 0.25 m in this
field?
Over how many kilometers would it have to be accelerated in the
same electric field to increase its kinetic energy by 65 GeV?
&...

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