A parallel-plate capacitor has capacitance 8.00 μF. (a) How much
energy is stored in the capacitor if it is connected to a 13.00-V
battery? μJ (b) If the battery is disconnected and the distance
between the charged plates doubled, what is the energy stored? μJ
(c) The battery is subsequently reattached to the capacitor, but
the plate separation remains as in part (b). How much energy is
stored? μJ
How does the energy stored in a capacitor change if each of the following happens?(a) The potential difference is doubled, while the capacitance is held constant (which choice is correct of the 4)????It is divided by 4.It is multiplied by 2.It is divided by 2.It is multiplied by 4.(b) The charge on each plate is decreased to one half, while connected to a battery.(which choice is correct of the four)??It is multiplied by 2.It is multiplied by 4.It is divided...
1. How is the charge stored on a capacitor related to the
capacitance of the capacitor and the potential difference across
the capacitor?
a. The charge equals the product of the capacitance and the
potential difference.
b. The charge equals the ratio of the potential difference to
the capacitance.
c. The charge equals the ratio of the capacitance to the
potential difference.
2. Which do we do to find the potential difference of a
capacitor?
a. integrate the electric field...
A parallel-plate vacuum capacitor has 7.64 J of energy stored in it. The separation between the plates is 2.30 mm. If the separation is decreased to 1.30 mm,a) what is the energy now stored if the capacitor was disconnected from the potential source before the separation of the plates was changed?b) What is the energy now stored if the capacitor remained connected to the potential source while the separation of the plates was changed?
1. Where is the energy stored in a capacitor? Why is it
necessary to hook capicitor up to a source of emf (like a battery)
in order for it to become charged? When answering, think back to
the lesson of electrostatic energy.
An electric motor is a device that transfers electrically stored
energy into kinetic energy. A very crude one would consist of a
conducting wire shaped as a loop with a steady electric current
passing through it placed in a uniform magnetic field. Let's
imagine that the magnetic field is directed along the positive
xx-axis, which we'll set up as going from left to right. The
yy-axis points up and the zz-axis points out. Assume an absence of
any frictional effects....
sketch and explain where energy and matter are stored in the
ecosystem and how they are transferred between living things,
emphasizing the similarities and differences between the fates of
energy and matter; or sketch and explain at least one
biogeochemical cycle in order to illustrate how matter is
transferred and transformed as it moves between reservoirs.
A parallel-plate vacuum capacitor has 7.22J of energy stored in
it. The separation between the plates is 2.70mm . If the separation
is decreased to 1.85mm ,
a) what is the energy now stored if the capacitor was
disconnected from the potential source before the separation of the
plates was changed?
b)
What is the energy now stored if the capacitor remained
connected to the potential source while the separation of the
plates was changed?
A parallel-plate vacuum capacitor has 8.22 JJ of energy stored
in it. The separation between the plates is 3.50 mmmm.
Part A
If the separation is decreased to 1.80 mmmm, what is the energy
now stored if the capacitor was disconnected from the potential
source before the separation of the plates was changed?
Express your answer in joules.
U = ?? J
Part B
If the separation is decreased to 1.80 mmmm, what is the energy
now stored if the...