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Test prep for ap courses
Two particles with charges +2
q and +
q are separated by a distance
r . The +2
q particle has an electric field
E at distance
r and exerts a force
F on the +
q particle. Use this information to answer questions 31–32.
What is the electric field of the +
q particle at the same distance and what force does it exert on the +2
q particle?
-
E /2,
F /2
-
E ,
F /2
-
E /2,
F
-
E ,
F
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When the +
q particle is replaced by a +3
q particle, what will be the electric field and force from the +2
q particle experienced by the +3
q particle?
-
E /3, 3
F
-
E , 3
F
-
E /3,
F
-
E ,
F
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The direction of the electric field of a negative charge is
- inward for both positive and negative charges.
- outward for both positive and negative charges.
- inward for other positive charges and outward for other negative charges.
- outward for other positive charges and inward for other negative charges.
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When a positively charged particle exerts an inward force on another particle
P , what will be the charge of
P ?
- positive
- negative
- neutral
- cannot be determined
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Suppose that the force exerted on an electron is 5.6×10
−17 N, directed to the east.
- Find the magnitude of the electric field that exerts the force.
- What will be the direction of the electric field?
- If the electron is replaced by a proton, what will be the magnitude of force exerted?
- What will be the direction of force on the proton?
(a) 350 N/C, (b) west, (c) 5.6×10−17 N, (d) west.
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Section summary
- The electrostatic force field surrounding a charged object extends out into space in all directions.
- The electrostatic force exerted by a point charge on a test charge at a distance
depends on the charge of both charges, as well as the distance between the two.
- The electric field
is defined to be
where
is the Coulomb or electrostatic force exerted on a small positive test charge
.
has units of N/C.
- The magnitude of the electric field
created by a point charge
is
where
is the distance from
. The electric field
is a vector and fields due to multiple charges add like vectors.
Conceptual questions
Problem exercises
What is the magnitude and direction of an electric field that exerts a
upward force on a
charge?
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What is the magnitude and direction of the force exerted on a
charge by a 250 N/C electric field that points due east?
N
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(a) What magnitude point charge creates a 10,000 N/C electric field at a distance of 0.250 m? (b) How large is the field at 10.0 m?
(a)
(b)
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Calculate the initial (from rest) acceleration of a proton in a
electric field (such as created by a research Van de Graaff). Explicitly show how you follow the steps in the Problem-Solving Strategy for electrostatics.
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(a) Find the direction and magnitude of an electric field that exerts a
westward force on an electron. (b) What magnitude and direction force does this field exert on a proton?
(a)
(b)
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Questions & Answers
sound waves can be modeled as a change in pressure ,why is the change on in pressure used and not the actual pressure
I am a university student of Myanmar.I am first year,first semester.I want to learn about physics.
Maung
two charges qA and qB are separated by a distance x. if we double the distance between the charges and triple the magnitude of the charge A, what happens to the magnitude of the force that charge A exerts on charge B.
what happens to the magnitude of the force that charge B exerts on charge A
how to get mcq and essay?
force is a pull or push action on an object or a body.
joseph
what is a significant figure? and give example
Frederick
numerical chapter number 3
a reflected ray on a mirror makes an angle of 20degree with the incident ray when the mirror is rotated 15degree what angle will the incident ray now make with the reflected ray
what is simple harmonic motion
how vapour pressure of a liquid lost through convection
Roofs are sometimes pushed off vertically during a tropical cyclone, and buildings sometimes explode outward when hit by a tornado. Use Bernoulli’s principle to explain these phenomena.
Plz answer the question ☝️☝️
Aliraza
what's the basic si unit of acceleration
Explain why the change in velocity is different in the two frames, whereas the change in
kinetic energy is the same in both.
Insulators (nonmetals) have a higher BE than metals, and it is more difficult for photons to eject electrons from insulators. Discuss how this relates to the free charges in metals that make them good conductors.
Is the photoelectric effect a direct consequence of the wave character of EM radiation or of the particle character of EM radiation? Explain briefly.
Muhammad
Determine the total force and the absolute pressure on the bottom of a swimming pool 28.0m by 8.5m whose uniform depth is 1 .8m.
how solve this problem?
Foday
P(pressure)=density ×depth×acceleration due to gravity
Force =P×Area(28.0x8.5)
Fomukom
for the answer to complete, the units need specified why
That's just how the AP grades. Otherwise, you could be talking about m/s when the answer requires m/s^2. They need to know what you are referring to.
Kyle
Source:
OpenStax, College physics for ap® courses. OpenStax CNX. Nov 04, 2016 Download for free at https://legacy.cnx.org/content/col11844/1.14
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