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Quizzes > High School Quizzes > Science

Coulombic Attraction Practice Quiz

Explore Pogil answers key for concept mastery

Difficulty: Moderate
Grade: Grade 11
Study OutcomesCheat Sheet
Paper art representing a trivia quiz about The Coulomb Key Challenge for high school physics students

What does Coulomb's law describe?
The relationship between mass and gravity
The conservation of energy in circuits
The electric force between two charged objects
The behavior of light in different mediums
Coulomb's law quantifies the electric force between point charges. It is a fundamental principle in electromagnetism that relates charge magnitudes and separation distance.
Which combination of charges experiences an attractive force according to Coulomb's law?
Any two charges regardless of sign
A positive charge and a negative charge
Two positive charges
Two negative charges
Opposite charges attract each other, which is a key aspect of electrostatic interactions described by Coulomb's law. This question reinforces the basic concept of attraction between unlike charges.
What happens to the magnitude of the electric force if the distance between two charges is doubled?
It is halved
It decreases to one-fourth of its original value
It doubles
It remains the same
Coulomb's law states that the force is inversely proportional to the square of the distance between the charges. Doubling the distance reduces the force by a factor of four.
If two charges are both positive, what type of force do they experience according to Coulomb's law?
Alternating attractive and repulsive forces
Attractive force
Zero force
Repulsive force
Like charges repel each other, which is a direct outcome of Coulomb's law. Thus, two positive charges will exert a repulsive force on each other.
What is the standard unit for measuring electric charge?
Joule
Newton
Coulomb
Volt
The Coulomb is the SI unit for electric charge and is fundamental in calculations involving Coulomb's law. This unit is used universally in electromagnetism.
Which equation correctly represents Coulomb's law?
F = k (q₝ - q₂) / r²
F = k |q₝q₂| / r
F = k |q₝q₂| / r²
F = k (q₝ + q₂) / r²
Coulomb's law states that the force between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. The correct formula is F = k|q₝q₂|/r².
If both charges in a system are doubled, how does the electric force between them change?
It remains unchanged
It doubles
It increases by a factor of 4
It decreases
Since Coulomb's law depends on the product of the two charges, doubling each charge multiplies the product by 4. Therefore, the force increases by a factor of 4.
What is the effect on the electric force if the distance between two charges is reduced to half its original value?
The force becomes four times greater
The force remains unchanged
The force is halved
The force doubles
Due to the inverse square relationship in Coulomb's law, reducing the distance by half increases the force by a factor of four. This illustrates the sensitivity of the force to distance changes.
What is the approximate value of Coulomb's constant (k) in SI units?
8.99 x 10❹ N·m²/C²
9.81 m/s²
6.67 x 10❻¹¹ N·m²/kg²
1.60 x 10❻¹❹ C
Coulomb's constant (k) is approximately 8.99 x 10❹ N·m²/C² and is a critical part of Coulomb's law. This constant bridges the relationship between charge magnitudes and the force exerted over a given distance.
What type of force is calculated by Coulomb's law between a proton and an electron?
Electrostatic force
Magnetic force
Gravitational force
Nuclear force
Coulomb's law is used to calculate the electrostatic force which arises between charged particles such as protons and electrons. This force is central to the structure and behavior of atoms.
Which formula correctly defines the electric field due to a point charge?
E = q / (k r²)
E = q / r
E = k |q| / r²
E = k q r
The electric field is defined as the force per unit charge created by a source charge. The correct representation is E = k|q|/r², which shows how the field diminishes with distance.
What type of force results from the interaction of a positive charge and a negative charge?
Oscillatory force
Zero force
Attractive force
Repulsive force
Opposite charges attract each other, which is a fundamental idea in Coulomb's law. The attractive force between a positive and a negative charge is what holds atoms together.
How should Coulomb's law be applied when finding the net force on a charge in a multi-charge system?
By averaging the forces from each charge
By considering only the closest charge
By adding the magnitudes of the individual forces
By calculating the vector sum of the forces due to each individual charge
In systems with multiple charges, the net force is obtained by vectorially adding the force contributions from each individual charge. This method accounts for both magnitude and direction.
Which of the following quantities does NOT affect the magnitude of the force in Coulomb's law?
Coulomb's constant
Magnitude of the charges
Mass of the charged objects
Distance between the charges
Coulomb's law calculates the electric force based on the charges' magnitudes, the separation distance, and Coulomb's constant. The mass of the charged objects does not influence this law.
If the magnitude of one charge is halved while the other remains constant, what is the resulting effect on the electric force?
The force is reduced to one-fourth
The force is doubled
The force is halved
The force remains the same
Since the force is directly proportional to the product of the charges, halving one charge results in the force being halved. This demonstrates the linear relationship of each charge in Coulomb's law.
A charge of 2 µC is fixed in space. Which element is essential when calculating the force on a 3 µC charge placed 0.5 m away using Coulomb's law?
Coulomb's constant and the square of the distance
The sum of the charges and the linear distance
The difference between the charges and the distance
Only the magnitude of the charges
Coulomb's law is expressed as F = k|q₝q₂|/r², which means that both Coulomb's constant and the square of the separation distance are essential in the calculation. Neglecting either would lead to an incorrect computation of the force.
Two charges are separated by a distance of 0.2 m, resulting in a force of 1.0 N. If one of the charges is tripled, what is the new force between them?
6.0 N
1.0 N
9.0 N
3.0 N
Tripling one charge increases the product of the charges by a factor of three. Since the force is directly proportional to this product, the new force becomes 3.0 N.
If the net force acting on a charge due to several other charges is zero, what does this indicate about the forces involved?
The individual forces cancel each other out vectorially
All individual forces are zero
The charges must be equal in magnitude
The forces are purely attractive
A net force of zero means that the vector sum of all forces acting on the charge equals zero. This can occur when opposing forces balance each other out, even if each individual force is non-zero.
Why is the electric force considered a vector quantity in Coulomb's law?
Because it only has magnitude
Because it has both magnitude and direction
Because it does not depend on distance
Because it is calculated using scalars
Electric force is a vector quantity as it is defined by both a magnitude and a direction. This quality is critical when analyzing the net force on a charge in a multi-charge system.
For an electric dipole, which consists of two equal and opposite charges separated by a distance d, how does the electric field along the axial line behave at large distances?
It remains constant
It decreases with the square of the distance
It decreases with the cube of the distance from the dipole
It decreases linearly with distance
At distances much larger than the separation of the dipole, the axial electric field decreases as 1/r³. This rate of decay is faster than that for a single point charge, which decreases as 1/r².
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Study Outcomes

  1. Understand the principles of electric force interactions between charged particles.
  2. Analyze the relationship between charge magnitude, distance, and force using Coulomb's law.
  3. Apply mathematical techniques to calculate the electric force in various scenarios.
  4. Synthesize problem-solving strategies to address and review interactive physics challenges.
  5. Evaluate experimental data and graphical representations to assess understanding of coulombic interactions.

Coulombic Attraction POGIL Answers Key Cheat Sheet

  1. Master Coulomb's Law - It's the foundation of electrostatics, showing how the force between two charges depends directly on their magnitudes and inversely on the square of their separation. Break out the formula F = k·(q₝q₂)/r² and watch charges dance! Keep this law close - it's your compass in the charged-particle world. SavemyExams Coulomb's Law Notes
  2. Link charge magnitude to force - When you boost one or both charges, the attraction or repulsion scales right with it - double the charge, double the force! Think of this like turning up the volume on your electric speaker. This concept helps you predict how molecular interactions shift as charges change. POGIL Answers on Charge Effects
  3. Spot the inverse square law - Increase the gap between charges, and the force drops off rapidly by the square of the distance. It's like moving away from a light bulb - the farther you go, the dimmer the glow. This inverse relationship is a key theme in all field-based physics. POGIL Answers on Distance Effects
  4. Periodic drop in attraction down a group - As atoms get bigger moving down a group, valence electrons sit further from the nucleus, so Coulombic pull weakens. Picture electrons chilling at a party further away from the DJ, feeling less groove. This explains why outer electrons are more loosely held. Quizlet: Periodic Trends Flashcards
  5. Proton power‑up across a period - More protons in the nucleus means electrons feel a stronger tug, shrinking atomic radii. Think of each added proton as turning up the nuclear magnet, pulling electrons in tighter. This underpins trends in element sizes across rows. Quizlet: Proton Effects in Periodic Table
  6. Charged-up ionic bonds - In ions, higher charges supercharge the Coulombic attraction, creating stronger ionic bonds. Imagine magnets with bigger poles snapping together extra tightly. This is why Mg²❺ bonds are tougher than Na❺ bonds. A‑Level Chemistry: Ionic Bond Strength
  7. Shielding shenanigans - Inner electrons get in the way, repelling outer electrons and reducing the pull from the nucleus. It's like a crowd buffering you from a celebrity - it weakens your connection! Shielding explains why larger atomic sizes sometimes defy simple expectations. NemoQuiz: Electron Shielding
  8. Ionization energy insights - Stronger nuclear pull means more energy is needed to eject an electron, so high Coulombic attraction drives up ionization energy. Picture trying to rip a Velcro strip off with different stickiness levels. Watch the spikes and dips in ionization energies as you move across the table. Quizlet: Ionization Energy Trends
  9. Electronegativity excitement - Atoms with strong Coulombic attraction really want to hog electrons in bonds, so electronegativity climbs. Think of it like an electron tug‑of‑war with the strongest team winning. This helps predict bond polarity and molecular behavior. Quizlet: Electronegativity Flashcards
  10. Lattice energy leaps - When ions assemble into a crystal lattice, the larger the Coulombic pull, the more energy you get back. It's the fireworks of the ionic world - strong attraction, big energy release! Lattice energy influences melting points, solubility, and more. SavemyExams: Lattice Energy Guide
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