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WorksheetsElectrostatics Review for Standard Physics Unit 7 2022
Total questions: 49
Worksheet time: 37mins
How many electrons would it take to have a total charge of -3 x 10^-6 Coulombs?
3 x 10^6 electrons
3 x 10^-6 electrons
1.875 x 10^13 electrons
5.33 x 10^-14 electrons
A RED metal sphere has a net charge of +2 Coulombs. An identical BLUE metal sphere has a net charge of -2 Coulombs. The conductive metal spheres are touched together and then separated. Which of the following statements correctly explains how the charges moved?
Negative charges moved from the RED sphere to the BLUE.
Negative charges moved from the BLUE sphere to the RED.
Positive charges moved from the RED sphere to the BLUE.
Positive charges moved from the BLUE sphere to the RED.
No charges move
A RED metal sphere has a net charge of +2 Coulombs. An identical BLUE metal sphere has a net charge of -2 Coulombs. The conductive metal spheres are touched together and then separated. Which of the following statements correctly identifies the net charge on both spheres after they are separated?
The RED sphere has a final charge of 0 Coulombs. The BLUE sphere has a final charge of 0 Coulombs
The RED sphere has a final charge of +2 Coulombs. The BLUE sphere has a final charge of -2 Coulombs
The RED sphere has a final charge of -4 Coulombs. The BLUE sphere has a final charge of -4 Coulombs
The RED sphere has a final charge of 2 Coulombs. The BLUE sphere has a final charge of 4 Coulombs
When the distance between two charges is doubled, the electrostatic force between the charges____________.
is doubled
is quadrupled
is halved
is quartered
The Coulomb is the unit for:
Charge, q
Force, F
Distance, r
Mass, m
A repulsive force exists between which two particles? (Select ALL that apply)
Two neutrons
Two electrons
An electron and a proton
Two protons
Which is the value of the constant in Coulomb's equation?
ke = 9·10-9
ke = 9.8
ke = 6.67·10-11
ke = 9 ·109
What does "r" measure?
the distance between the two charged objects
the amount of charge carried by the objects
the amount of force between two charged objects
the constant value for forces between the objects
Which best characterizes the relationship between the strength of the gravitational force and the strength of the electric force?
The gravitational force is very strong and the electric force is very weak
The gravitational force is very weak and the electric force is very strong
Both the gravitational force and the electric force are strong forces
What does q measure?
the distance between the two charged objects
the amount of charge carried by the object
the amount of force between two charged objects
The charge of a single proton is....
1.6 x 10^-19 Coulombs
1 x 10^-10 Coulombs
3.2 x 10^-19 Coulombs
1 Coulomb
Calculate the electric force between an electron and a proton that are a distance of 1 x 10^-14 meters apart.
2.304 x 10^-14 Newtons
4.608 x 10^-14 Newtons
2.304 Newtons
4.608 Newtons
As shown above, two particles, each of charge +Q, are fixedat opposite corners of a square that lies in the plane of the page. A positive test charge +q is placed at a third corner. What is the direction of the force on the test charge due to the other two charges>
Assuming the two charges have the same magnitude of charge, what direction must the electric field point at the black dot?
RIGHT
LEFT
UP
DOWN
THERE IS NO ELECTRIC FIELD AT THIS POINT
At a distance of 0.5 meters from a 0.003 Coulomb charge, what is the magnitude of the electric field strength from the particle?
5.4 x 10^7 [N/C]
1.08 x 10^8 [N/C]
3.375 x 10^6 [N/C]
10 [N/C]
Assuming the two charges have the same magnitude of charge, what direction must the electric field point at the black dot?
RIGHT
LEFT
UP
DOWN
THERE IS NO ELECTRIC FIELD AT THIS POINT
Assuming the two charges have the same magnitude of charge, what direction must the electric field point at the black dot?
RIGHT
LEFT
UP
DOWN
THERE IS NO ELECTRIC FIELD AT THIS POINT
Assuming the two charges have the same magnitude of charge, what direction must the electric field point at the black dot?
RIGHT
LEFT
UP
DOWN
THERE IS NO ELECTRIC FIELD AT THIS POINT
A charged particle "q" sits in an electric field with some unknown electric field strength "E". An electrostatic force of F = 2 X 102 Newtons is exerted on the charge q = 4 Coulombs. What must be the electric field strength in this region of space, needed to cause this force?
The force between two point charges is F when they are separated by a distance r. If the separation is increased to 3r what is the force between the charges?
F/3r
F/9r
F/3
F/9
Electric field lines always point from _____ potential to ______ potential
Higher, Lower
Lower, Higher
Not enough information to determine
The direction of electric field lines shows the
direction of the force on a test positive charge.
size of the field.
strength of the field.
all of the above
Electric force is also equal to the electric field multiply with a charge. True or False?
True
False
The electric field lines for a positive charge is always directed away from the charge. True or False?
True
False
How much does a charge's electric potential energy change as it is moved along a line of equipotential?
It depends on the line
It increases
It decreases
The energy does not change along the line of equipotential
Along a line of equipotential the voltage...
Decreases along the line
Is the same along the entire line
Is proportional to the area inside the shape created by the line
Changes
Two points in space are separated by a distance of 1 millimeter (0.001 meters). If one point has a voltage of 100 V and the other has a voltage of 300 V, what must be the electric field strength between the two points?
300 V/m
200,000 V/m
400,000 V/m
0.000000 V/m
What is the electric potential from a 0.00001 Coulomb charge a distance of 5 meters away?
5 V
1.6 x 10^-19 V
180,000 V
500,000 V
The SI unit for electric potential is the ___________.
Volen
Vespa
Volt
Valspar
True or False: Electric Potential is the same thing as "Voltage"
True!
False!
The electric potential field is a _______ field
Vector
Scalar
True or False: Electric Potential can be negative, positive, or equal to zero
True
False
A short distance away from an electron the electric potential must be
positive
negative
zero
Directly between two protons the ELECTRIC POTENTIAL must be
positive
negative
zero
Directly between a proton and an electron the electric potential must be
positive
negative
zero
A charged particle creates an electric potential equal to "V" volts at a distance of "r" meters away from the charge. What is the voltage at a distance that is twice as far away, "2r" in terms of the original voltage V?
2V
V
V/2
4V
V/4
Calculate the electric potential created by a proton at a distance of 1 x 10^-8 meters.
0.144 Volts
0.288 Volts
1.44 x 10^7 Volts
2.88 x 10^7 Volts
Calculate the potential energy of an electron and a proton that are 1 x 10^-9 meters apart.
2.304 x 10^-19 Joules
-2.304 x 10^-19 Joules
1.44 x 10^-28 Joules
-1.44 x 10^-28 Joules
Over a distance of 0.02 meters the electric potential changes from 3 Volts to 10 Volts. What is the magnitude of the electric field in this region of space?
0.14 V/m
0.0012 V/m
200 V/m
350 V/m
At which line of equipotential would the electric potential be the most negative?
A
B
C
Calculate the magnitude of the electric field between the two blue lines of equipotential
30,000 N/C
50,000 N/C
3 N/C
5 N/C
What direction does the electric field point at position C?
Left
Right
Up
Down
Calculate the potential energy that a -4 x 10^-3 Coulomb charge would have when placed at a voltage of -20,000 Volts.
20,000,000 Joules
-20,000,000 Joules
-80 Joules
80 Joules
