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Questions and Answers
What is the direction of the force exerted on an electron traveling horizontally when it enters a region with a uniform electric field directed upward?
What is the direction of the force exerted on an electron traveling horizontally when it enters a region with a uniform electric field directed upward?
Which of the following situations DOES NOT guarantee an increase in the magnitude of electric force?
Which of the following situations DOES NOT guarantee an increase in the magnitude of electric force?
If a -2.3x10^-4 C charge exerts a repulsive force of magnitude 0.35 N on an unknown charge 0.20 m away, what are the magnitude and polarity of the unknown charge?
If a -2.3x10^-4 C charge exerts a repulsive force of magnitude 0.35 N on an unknown charge 0.20 m away, what are the magnitude and polarity of the unknown charge?
If the distance between two charged objects is doubled and the magnitude of one charge is also doubled, what happens to the electric force between them?
If the distance between two charged objects is doubled and the magnitude of one charge is also doubled, what happens to the electric force between them?
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What is the resulting force of a dipole (electron and proton) separated by a distance of 5.29x10^-11 m?
What is the resulting force of a dipole (electron and proton) separated by a distance of 5.29x10^-11 m?
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What happens when the product of the charges between an electron and a proton is increased by a factor of two?
What happens when the product of the charges between an electron and a proton is increased by a factor of two?
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If the product of the charges between an electron and a proton is increased by a factor of four, what effect does it have on the distance between them?
If the product of the charges between an electron and a proton is increased by a factor of four, what effect does it have on the distance between them?
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When is the electric force between an electron and a proton 4.7x10^-19 N?
When is the electric force between an electron and a proton 4.7x10^-19 N?
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What is the magnitude of the electric field due to a 4.0 nC charge at a point 2 cm away?
What is the magnitude of the electric field due to a 4.0 nC charge at a point 2 cm away?
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If the electric field 2.0m from a point charge is 8.0x10^4 N/C, what is the strength of the electric field at a distance of 4.0 m?
If the electric field 2.0m from a point charge is 8.0x10^4 N/C, what is the strength of the electric field at a distance of 4.0 m?
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Given a -1.2μC charge, an electric field of 2500 N/C directed along the +y axis, what is the magnitude and direction of the electric force?
Given a -1.2μC charge, an electric field of 2500 N/C directed along the +y axis, what is the magnitude and direction of the electric force?
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Study Notes
Direction of Force on an Electron
- An electron traveling horizontally in an upward-directed electric field experiences a downward force due to its negative charge.
Situations Affecting Electric Force
- Increasing the distance between two charges does not guarantee an increase in the magnitude of the electric force; rather, it typically decreases the force.
Unknown Charge Calculation
- Coulomb's Law: Given a -2.3 x 10^-4 C charge exerting a 0.35 N repulsive force at 0.20 m distance, the unknown charge can be calculated to be +6.67 x 10^-5 C due to the repulsion indicating opposite charges.
Effect of Distance on Electric Force
- Doubling the distance between two charged objects while also doubling one of the charges results in a halving of the electric force between them.
Dipole Force Calculation
- The resulting force of a dipole (electron and proton) separated by a distance of 5.29 x 10^-11 m can be quantified using Coulomb's law, showing the attractive force due to their opposite charges.
Impact of Charge Product on Force
- Increasing the product of the charges between an electron and a proton by a factor of two doubles the electric force between them.
Effect of Charge Product on Distance
- Increasing the product of charges between an electron and a proton by a factor of four necessitates a decrease in distance to maintain the equilibrium of electric forces according to Coulomb's Law.
Electric Force Value
- The electric force between an electron and a proton is 4.7 x 10^-19 N when calculated at their standard separation determined by Coulomb's law.
Electric Field Calculation
- The magnitude of the electric field created by a 4.0 nC charge at a distance of 2 cm is approximately 4.5 x 10^5 N/C.
Electric Field Strength Variation
- At a distance of 2.0 m from a point charge producing an electric field of 8.0 x 10^4 N/C, the electric field strength at 4.0 m is reduced to 2.0 x 10^4 N/C.
Electric Force on a Charge in an Electric Field
- A -1.2 μC charge in a 2500 N/C electric field directed along the +y axis experiences a force of -3.0 N in the negative y direction (opposite the field direction due to negative charge).
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Description
Test your knowledge on electric fields and forces with this quiz. Answer questions about the direction of forces exerted on charged particles, factors affecting the magnitude of electric force, and more.
