Question

What is the force between a charge of 5 µC and 6 µC when they are spaced 4.5 cm apart?

Two equal but opposite charges, Q = 18e, are separated by a distance d = 5 mm. What is the electric field at the point P, which is a distance x = 22 µm from the positive charge? The two charges and point P are all along a single straight line.

One electron is placed 4.4 cm from a stationary 4e charge. How fast will the electron be traveling when it reaches the stationary charge? You can find the electron charge and electron mass in the front cover of your book.

Consider a point charge generating an electric field. At a distance of 19.7 cm from the charge, the magnitude of the electric field is 7.3 V/m. What is the electric potential at the same distance?

Two parallel plates each with 14 nC of charge stored on them,
and an area of 0.142 m^{2}. The voltage across the plates
is 4 V. What is the space between the places in mm?

Answer #1

Two point charges are on the y axis. A 3.10-µC charge
is located at y = 1.25 cm, and a -2-µC charge is located
at y = −1.80 cm.
(a) Find the total electric potential at the origin.
________ V
(b) Find the total electric potential at the point whose
coordinates are (1.50 cm, 0).
________ V

Two charges Q = 5 µC are located at ℓ = ±10 cm on the y-axis as
shown. What is the strength of the electric field at a point P a
distance d = 30 cm away on the x-axis?

Point charges of 28.0 µC and 43.0 µC are placed 0.500 m
apart.
(a) At what point along the line connecting them is the electric
field zero?
How are the electric fields due to each charge related? How can you
put the two distances in terms of one distance? m (from the smaller
charge)
(b) What are the magnitude and direction of the net electric field
halfway between them?
magnitude
N/C
direction
---Select--- toward the smaller charge toward the larger...

A 1.0 µC point charge and a 7.0 µC point charge are a distance
L apart. Where should a third point charge be placed so
that the electric force on that third charge is zero? (Use the
following as necessary: L.)
away from the 1.0 µC charge, ---Select--- between the charges on
the far side of the 1 µC charge on the far side of the 7 µC charge
.

Two stationary positive point charges, charge 1 of magnitude
3.80 nC and charge 2 of magnitude 1.90 nC , are separated by a
distance of 53.0 cm . An electron is released from rest at the
point midway between the two charges, and it moves along the line
connecting the two charges.
A. What is the speed v final the electron when it is 10.0 cm
from charge 1?
Express your answer in meters per second.

1. What potential difference is needed to accelerate a He+ ion
(charge +e, mass 4u) from rest to a speed of 1.1×106 m/s
?
2. Two 2.00 cm × 2.00 cm plates that form a parallel-plate
capacitor are charged to ± 0.708 nC .
a) What is the electric field strength inside the capacitor if
the spacing between the plates is 1.30 mm ?
b)What is potential difference across the capacitor if the
spacing between the plates is 1.30 mm...

There are two point charges given as: q1 = -1.3 µC at (-15 cm,
-10 cm) q2 = -9.1 µC at (10 cm, 5 cm) A specific point, P, is
located at (15 cm, -12 cm). two charges Part A What is the
magnitude of the force on q1 due to its interaction with q2? F1,2 =
Correct: Your answer is correct. N Part B What is the net electric
field magnitude at point P? EP = 6.046E4 Incorrect: Your...

Assume you are given two point charges. One of them with a
charge of +16 µC is replaced at the origin. The second one is
replaced at x=8 cm. If the net electric field is zero at x= 16 cm,
what is the charge of the second particle.

1. The force between two charges is 4×10−9N. If the magnitude of
one charge reduced by a factor of two and the distance between the
charges is reduced by a factor of two, what is the new force
between the charges?
2. What is the magnitude of the electric field from 20cm from a
point charge of q=33nC?
3. What is the electric field 10cm from a 50-cm-radius metal
sphere carrying −4.5×106C of charge?
4. Point charges are located at...

Two point charges of charge 25.0 µC and −25.0 µC respectively
are separated by a distance of 10.0 nm.
a) What is the dipole moment magnitude and direction?
b) How much energy does it require to rotate this dipole 180◦ in
a constant electric ﬁeld of 1200 V/m assuming the initial
orientation is such that the dipole moment points along the
electric ﬁeld lines?
c) What is the maximum torque?
d) Draw the electric potential line pattern.

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