Question

A 2uF capacitor is charged to 100V.

A) how much energy is stored in the capacitor?

B) How much additional energy is required to charge the capacitor from 100 to 120V?

Answer #1

A 100 microfarad capacitor is charged to 24 volts DC. How much
charge is placed on each plate and how much energy is stored in the
capacitor? If that capacitor is discharged in 100 microseconds, how
much power did it deliver during that time?

A portable defibrillator containing an 85 ?F capacitor is
charged up to a potential difference of 8000 V.
a) How much energy is stored in the device? What kind of energy
is this stored energy?
b. How much positive charge is on one plate of the capacitor
when it is fully charged? What is the net charge on both plates?
Explain why this is the case.

A 5.00 µF capacitor starts with 3.00 J of stored energy. The
capacitor is then discharged while connected to a 500 kΩ
resistor.
a) Find the initial charge on the capacitor and the current
through the resistor when the discharging begins.
b) Find the charge on the capacitor, the current through the
resistor, and the power dissipated in the resistor as a function of
time.
c) At what time will the capacitor have one quarter of its
original charge?

A 16.0 μF capacitor is charged to a potential of 50.0 V and then
discharged through a 225 Ω resistor.
a. How long does it take the capacitor to lose half of its
charge?
b. How long does it take the capacitor to lose half of its
stored energy?

1. What is the energy stored in the 8.1 μF capacitor of a heart
defibrillator charged to 9.9 kV?
2. How far apart are two conducting plates that have an electric
field strength of 3.5×103 V/m between them, if their
potential difference is12 kV?
3. The naturally occurring charge on the ground on a fine day
out in the open country is 2.32 nC. What is the electric potential
at a height of 3.98 m?
4. What is the strength...

a
parallel plate capacitor is fully charged by a battery, and then
the battery is disconnected. if a dielectric material is then
inserted between the capacitor plates, which of the following
quantities would remain constant?
A) electric field between the plates
B) potential difference across the plates
C) charge on each plate
D) energy stored in capacitor
E) charge and energy would both remain constant

1. A parallel plat capacitor with C= 20 ?F is being charged by a
battery of ?=12 V. If total resistance of the circuit is 5.2 k?,
then: a) How long does it take for the capacitor to charge to 90%
of fully charged? b) Draw the current profile and determine the
current at this time. c) How much energy is stored in the capacitor
by this time? 3 d) To what value should we change the resistance so
that...

A 33 nf capacitor is connected to a 9.00 V battery and fully
charged. The capacitor is then disconnected from the battery, an an
insulator having a dielectric constant is inserted between the
plates of the charged capacitor. What is the energy stored in the
capacitor with the dielectric inserted?

A 14μ F capacitor is joined in series with a 30μ F capacitor and
a 12 Volts battery.
What is the potential difference across the first capacitor?
What is the potential difference across the second
capacitor?
What is the charge on the first capacitor?
What is the charge on the second capacitor?
How much energy is stored by the first capacitor?
How much energy is stored by the second capacitor?

A20nF air capacitor is connected to a power supply, the energy
stored in the capacitor is 900 x 10 J. While the capacitor is kept
connected to the power supply, a slab of dielectric is inserted
that completely fills the space between the plates. This increases
the stored energy by 180 x 10-5 J. lhat is the dielectric constant
of the slab?

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