Suppose you have the 8.25 μF capacitor of a heart defibrillator
at a potential difference of...
Suppose you have the 8.25 μF capacitor of a heart defibrillator
at a potential difference of 13.5 × 104 V. C = 8.25 μF V = 13.5 ×
104 V a) What is the energy stored in it in J? b) Find the amount
of stored charge in mC.
A 14.5-μF capacitor is charged to a potential of 40.0 V and then
discharged through a 65.0 Ω resistor.
1. How long after discharge begins does it take for the
capacitor to lose 90.0% of its initial charge?
2. How long after discharge begins does it take for the
capacitor to lose 90.0% of its initial energy?
3. What is the current through the resistor at the time when the
capacitor has lost 90.0% of its initial charge?
4. What...
1. If you apply the potential difference V to a parallel plate
capacitor, it is charged to the charge value Q. Now you double the
separation between the plates keeping the same V. As a result,
charge on the plates will be equal to:
A. 2Q;
B. 4Q;
C. Q;
D. Q/2;
E. Q/4;
2. You have several capacitors of different capacitances. Which
statement is correct?
A. If the capacitors connected to a battery in series, charges
on all capacitors...
The potential difference across a charged capacitor is 22 V. The
capacitor discharges through a fixed resistor. After a time equal
to the time constant, the potential difference has reduced to
V. The magnitude of V is:
When the potential difference between the plates of a capacitor
is halved, the magnitude of the electric energy stored in the
capacitor U:
a. is 2U b. is U/2
c. remains the same d. is U/4
EXPLAIN.
When a potential difference of 142 V is applied to the plates of
a parallel-plate capacitor, the plates carry a surface charge
density of 45.0 nC/cm2. What is the spacing between the plates?
You have three capacitors: C1 = 1500. μF, C2 = 2400. μF, and C3
= 3600. μF. Find Ceq for a) all in series b) all in parallel c) c1
and c2 are in parallel and c3 in series with them d) c2 and c3 in
parallel and R1 in series with them, e)c1 and c3 in parallel and c2
in series with them. f) For one of the three arrangements where
only two of the caps are connected in...
Two identical parallel-plate capacitors, each with capacitance
20.0 μF, are charged to potential difference 40.0 V and
then disconnected from the battery. They are then connected to each
other in parallel with plates of like sign connected. Finally, the
plate separation in one of the capacitors is doubled. (a) Find the
total energy of the system of two capacitors before the plate
separation is doubled. (b) Find the potential difference across
each capacitor after the plate separation is doubled. (c)...
A 12.2??F capacitor is connected through a 0.885?M?
resistor to a constant potential difference of 60.0 V.
Part A. Compute the charge on the capacitor at the following
times after the connections are made: 0, 5.0
s, 10.0 s, 20.0 s, and 100.0 s.
Part B. Compute the charging currents at the same instants.
Suppose you borrow $46,000 at 8.25% annual interest to be repaid
with a fully amortized plan over 14 years (equal end-of-year
payments). What is the total amount of principal and interest
paid?
2. You are an engineer trying to design a capacitor. You have a
parallel-plate capacitor made of two circular metal plates. The
radius of each plate is 1 m and they are separated by a distance of
0.1 mm. If the space in between the plates was filled with vacuum,
the capacitor would have a capacitance of 0.278 μF but you want to
make this capacitor have a capacitance of 1.0 μF. You only have
paraffin (K=2.2) and glass (K=5)...