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Questions and Answers
Two point charges, +4q and -q, are separated by a distance r. What can be said about the magnitude of the force between them?
Two point charges, +4q and -q, are separated by a distance r. What can be said about the magnitude of the force between them?
- The force on +4q is equal in magnitude and opposite in direction to the force on -q. (correct)
- The force on +4q is four times greater than the force on -q.
- The force on -q is four times greater than the force on +4q.
- The force on +4q and -q is zero.
If the distance between two charged objects is doubled, how does the electrostatic force between them change?
If the distance between two charged objects is doubled, how does the electrostatic force between them change?
- It is reduced to one-half.
- It quadruples.
- It is reduced to one-quarter. (correct)
- It doubles.
A positive test charge is placed in an electric field. In which direction will the charge move?
A positive test charge is placed in an electric field. In which direction will the charge move?
- Opposite to the direction of the electric field.
- It will not move.
- In the direction of the electric field. (correct)
- Perpendicular to the direction of the electric field.
Which of the following materials is the best electrical conductor?
Which of the following materials is the best electrical conductor?
Which method of charging involves no contact between the charged object and the neutral object?
Which method of charging involves no contact between the charged object and the neutral object?
What happens when a rubber rod is rubbed with fur?
What happens when a rubber rod is rubbed with fur?
In electrostatic painting, what property of the paint particles helps them to efficiently coat an object?
In electrostatic painting, what property of the paint particles helps them to efficiently coat an object?
Which subatomic particle determines an element's atomic number?
Which subatomic particle determines an element's atomic number?
Two identical metal spheres, one with a charge of +5q and the other with a charge of -q, are brought into contact and then separated. What is the final charge on each sphere?
Two identical metal spheres, one with a charge of +5q and the other with a charge of -q, are brought into contact and then separated. What is the final charge on each sphere?
What is the primary role of neutrons in the nucleus of an atom?
What is the primary role of neutrons in the nucleus of an atom?
A neutral electroscope is charged by induction using a negatively charged rod. What is the sign of the charge on the electroscope after the rod is removed?
A neutral electroscope is charged by induction using a negatively charged rod. What is the sign of the charge on the electroscope after the rod is removed?
An object has a charge of -3.204 x 10^-19 C. How many excess electrons does it have?
An object has a charge of -3.204 x 10^-19 C. How many excess electrons does it have?
Which of the following is an application of static electricity?
Which of the following is an application of static electricity?
What distinguishes isotopes of the same element?
What distinguishes isotopes of the same element?
A charge of +2.0 x 10^-6 C is at a distance of 3.0 m from a charge of -3.0 x 10^-6 C. What is the magnitude of the force between them?
A charge of +2.0 x 10^-6 C is at a distance of 3.0 m from a charge of -3.0 x 10^-6 C. What is the magnitude of the force between them?
An electric field is strongest where:
An electric field is strongest where:
If a conductor is in electrostatic equilibrium, what is the electric field inside the conductor?
If a conductor is in electrostatic equilibrium, what is the electric field inside the conductor?
What best describes the triboelectric series?
What best describes the triboelectric series?
In a photocopier, what role do electrostatic forces play?
In a photocopier, what role do electrostatic forces play?
How does grounding a charged object affect its charge?
How does grounding a charged object affect its charge?
Flashcards
Electric Charge
Electric Charge
Fundamental property causing matter to experience force in proximity to other charged matter.
Coulomb's Law
Coulomb's Law
Quantifies force between two point charges; force is proportional to charge magnitudes and inversely proportional to the square of the distance.
Electric Field
Electric Field
Region around a charged object where force is exerted on other charged objects.
Electrical Conductors
Electrical Conductors
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Electrical Insulators
Electrical Insulators
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Charging by Friction
Charging by Friction
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Charging by Conduction
Charging by Conduction
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Charging by Induction
Charging by Induction
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Electrons
Electrons
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Protons
Protons
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Neutrons
Neutrons
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Electrostatic Painting
Electrostatic Painting
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Electrostatic Air Filters
Electrostatic Air Filters
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Photocopiers
Photocopiers
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Lightning
Lightning
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