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WorksheetsElectrostatics, Electric Fields and Coulomb's Law
Total questions: 25
Worksheet time: 25mins
Coulomb’s law states that the force between two charged objects will __________ when the magnitude (value) of the object’s charge increases.
increase
decrease
stay the same
first increase, then decrease
If one of the charges doubles, what happens to the force?
it doubles
it gets cut in half
it quadruples
it is cut by 1/4
A point charge (q1) has a magnitude of 3x10-6 C. A second charge (q2) has a magnitude of -1.5x10-6 C and is located 0.12 m from the first charge. Determine the electrostatic force each charge exerts on the other.
-4.52 x 10-3 N
-83 N
-2.81 N
-9 x 103 N
Consider the electric field lines shown in the diagram below. From the diagram, it is apparent that object A is ____ and object B is ____.
+,+
+,-
-,+
-,-
If the distance between two charges is halved, how does the force between them change according to Coulomb's Law?
It is halved
It is quartered
It is doubled
It increases by four times
What does Coulomb's Law describe?
The relationship between electric current and magnetic fields
The force between two charges being directly proportional to the product of their charges and inversely proportional to the square of the distance between them
The rate of flow of electric charge
The resistance offered by a material to the flow of electric current
According to Coulomb's Law, what happens to the force between two charges if the charge of one is tripled and the distance between them is also tripled?
The force remains unchanged
The force is tripled
The force is nine times greater
The force is reduced to one-third
What is the unit of electric charge?
Joule
Newton
Coulomb
Ampere
If each of the charges doubles, what happens to the electrostatic force?
Quadruples
Doubles
Stays the same
Reduced by half
If a negatively charged rod touches a conductor, the conductor will be charged by what method?
Friction
Conduction
Induction
Convection
Which of the following is NOT a property of electric charge?
Quantization
Conservation
Invisibility
Transferability
True or false: Conservation of charge states that electrons may be destroyed when transferred from one material to another.
True
False
A negatively charged particle is
An Electron
A Proton
A Neutron
A Negatron
Based on the arrangement of the electric field lines in the diagram, what are the charges?
both charges are the same
the charges are opposite
they are neutral; no charge
Coulomb's law also says if distance increases, then force
decreases
disapears
destroyed in a heartbeat
doubles
What is the unit for electrostatic charge?
Coulombs
Newtons
Meters
Joules
The variable "r" in Coulomb's Law would have what units?
Joules
Coulombs
Newtons
Meters
What happens to the force between two charged objects if you reduce the distance between two objects from 30 cm to 10 cm?
3X
20X
9X
1/3X
What is the value of Coulomb's Electrostatic Constant?
8.99 x 109 Nm2C-2
8.987 Nm2C-2
8.987 x 1011 Nm2C-2
7.1 x 104.5 Nm2C-2
The magnitude of the electric force between two charged objects is given by an equation known as:
Coulomb's Law.
Ohm's Law.
Newton's Third Law.
Murphy's Law.
Before the balloons and sweaters are rubbed together, both objects are __________ charged. After they are rubbed together the sweater is __________ charged and the balloon is ___________ charged
negative/positive/negative
neutral/positive/negative
positive/negative/neutral
neutral/negative/positive
What is the direction of the electric field at a point in space?
A) In the direction of the force on a positive test charge
B) Opposite to the direction of the force on a positive test charge
C) In the direction of the force on a negative test charge
D) Opposite to the direction of the force on a negative test charge
Two point charges, q1=5μC and q2=−3μC , are placed 0.2 meters apart. Calculate the magnitude of the electrostatic force between them using Coulomb's Law.
A) 3.375 N
B) 1.6875 N
C) 0.84375 N
D) 6.75 N
Which of the following statements about electric field lines is true?
A) Electric field lines can cross each other
B) Electric field lines start on positive charges and end on negative charges
C) Electric field lines form closed loops
D) Electric field lines are always straight
A charged particle is placed in a uniform electric field. What is the relationship between the force experienced by the particle and the electric field?
A) The force is inversely proportional to the electric field
B) The force is directly proportional to the electric field
C) The force is independent of the electric field
D) The force is equal to the electric field
