3.1E-6 is from series. so you add them by 1/C and the answer is 1/c. so for the first one i did 1/8.6E-6 + 1/4.8E-6 = 1/C where C is 3.1E-6
4.1E-6 is also from series. i did 1/6.2E-6 + 1/11.8E-6 = 1/C where C is 4.1E-6.
7.6E-6 is parallel so you just add them. i added 4.1E-6 to 3.5E-6
i did this in three steps. i found C from the first two as a series. then i found c from the top two as a series. then i used my answer from the top two and the lower capacitator as a parallel network. so in the last calculation i did 4E-6. AH! there is my mistake. before i had my old...
For the capacitor network shown in the figure, the potential difference across ab is 12V. Find (a) the total energy stored in this network and (b) the energy stored in the 4.8 uF capacitor.
figure: http://i.imgur.com/Wxbuu.png
ATTEMPT:
PART A:
i first did the leftmost 2 capacitors...
An irregular neutral conductor has a hollow cavity inside of it and is insulated from its surroundings. An excess charge of 16.0 nC is sprayed onto this conductor.
A) Find the charge on the inner surface of the conductor.
B) Find the charge on the outer surface of the conductor.
C) Without...
A point charge 6.50 nC is at the center of a cube with sides of length 0.260 m.
PART A: What is the electric flux through the surface of the cube?
PART B: What is the electric flux through one of the six faces of the cube?
ATTEMPT:
A)
Total flux enclosed by the cube = Q / eo...
A proton is traveling horizontally to the right at 4.20×106 m/s.
Find (a)the magnitude and (b) direction (counterclockwise from the left direction) of the weakest electric field that can bring the proton uniformly to rest over a distance of 3.40 cm.
Part C: How much time does it take the...
thank you. my mistake. for the magnitude i got 1.04E7 N/C. i found the x components of E for the charges. I know that there is no net E in the Y direction. then i added those x components up. is this correct? (1.04E7 N/C)
Three negative point charges lie along a line as shown in the figure.
figure: http://tinyurl.com/7xppvc8
Find the magnitude and direction of the electric field this combination of charges produces at point , which lies 6.00 from the charge measured perpendicular to the line connecting the...
A 20-cm radius ball is uniformly charged to 80 nC.
(a) What is the ball’s charge density (C/m3)?
(b) How much charge is enclosed by spheres at points 5, 10 and 20 cm
from the center?
(c) What is the electric ﬁeld strength at points 5, 10 and 20 cm from the
center?
ATTEMPT:
part a: i...
ok, i don't know how to start. my initial thought is that E on the x-axis is zero. the three charges pull in the y direction. i can't see anything that would pull/push in the x-direction. is this right?
A tetrahedron has an equilateral triangle base with 20-cm-long edges and
three equilateral triangle sides. The base is parallel to the ground and a
vertical uniform electric ﬁeld of strength 200 N/C passes upward through
the object.
(a) What is the electric ﬂux through the base?
(b) What is...
Is this question worded poorly or is it just me?
Three charges are on the y-axis. Charges -q are at y = ±d and charge + 2q is at y = 0.
(a) Determine the electric ﬁeld E along the x-axis.
(b) Verify that your answers to part a has the expected behavior as x
becomes very small and very...
The acceleration = F/m = E*q/m
So at y max vy = 0 so
vy^2 = vy0^2 - 2*E*q/m*ymax
So vy0 = sqrt(2*E*q/m*ymax) = sqrt(2*1.20x10^4*1.60x10^-19/9.11x10^-31… = 9.18x10^6m/s
So v0 = vy0/sin(45) = 9.18x10^6m/s/sin(45) = 1.30x10^7m/s
Two parallel plates are 2.0 cm apart and the electric ﬁeld strength between
them is 1.0 × 10^4 N/C. An electron is launched at a 45 degree angle from the
positive plate. What is the maximum initial speed v0 the electron can have
without hitting the negative plate?
i think the answer is...