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Catégorie :Category: nCreator TI-Nspire
Auteur Author: Infestedbird
Type : Classeur 3.0.1
Page(s) : 1
Taille Size: 12.16 Ko KB
Mis en ligne Uploaded: 19/02/2025 - 23:01:39
Uploadeur Uploader: Infestedbird (Profil)
Téléchargements Downloads: 2
Visibilité Visibility: Archive publique
Shortlink : http://ti-pla.net/a4511423
Type : Classeur 3.0.1
Page(s) : 1
Taille Size: 12.16 Ko KB
Mis en ligne Uploaded: 19/02/2025 - 23:01:39
Uploadeur Uploader: Infestedbird (Profil)
Téléchargements Downloads: 2
Visibilité Visibility: Archive publique
Shortlink : http://ti-pla.net/a4511423
Description
Fichier Nspire généré sur TI-Planet.org.
Compatible OS 3.0 et ultérieurs.
<<
Comprehensive Conceptual Questions & Answers for Midterm Review 1. Electric Charge & Coulombs Law Q1: What are the two types of electric charge, and how do they interact? A: There are positive and negative charges. Like charges repel, and opposite charges attract. This is due to the electric force described by Coulombs Law. Q2: What is the difference between conductors and insulators? A: Conductors allow free movement of charge (e.g., metals), while insulators hold charges in place (e.g., rubber, glass). Q3: How does Coulombs Law describe the force between two charges? A: Coulombs Law states that the force between two charges is given by: F = k q 1 q 2 r 2 F = frac{k q_1 q_2}{r^2} where k k is Coulombs constant, q 1 q_1 and q 2 q_2 are the charges, and r r is the distance between them. Q4: What happens to the force if the distance between two charges is doubled? A: Since force is inversely proportional to the square of distance, doubling r r reduces the force to 1 4 frac{1}{4} of its original value. Q5: Can a neutral object be attracted to a charged object? Why? A: Yes. A neutral object can experience polarization, where charge redistribution creates local attraction. 2. Electric Field Q6: What is an electric field? A: An electric field describes the force per unit charge experienced by a small test charge. It is given by E = F q E = frac{F}{q} . Q7: What is the direction of an electric field produced by a positive charge? A: The field radiates outward from a positive charge and inward toward a negative charge. Q8: How does the principle of superposition apply to electric fields? A: The total electric field at a point is the vector sum of the electric fields due to individual charges. Q9: Why do electric field lines never cross? A: If they did, a charge at that point would experience two different directions of force simultaneously, which is impossible. Q10: If the net electric field at a point is zero, what does that imply about surrounding charges? A: It means that the contributions from all nearby charges cancel out at that specific location. 3. Gausss Law & Electric Flux Q11: What is Gausss Law in mathematical form? A: Gausss Law states that the total electric flux through a closed surface is proportional to the charge enclosed: ¦ E = . E Å d A = Q e n c µ 0 Phi_E = oint E cdot dA = frac{Q_{enc}}{varepsilon_0} Q12: How does symmetry help in using Gausss Law? A: Gausss Law is easiest to apply when there is high symmetry (spherical, cylindrical, or planar), allowing the electric field to be factored out. Q13: What is the electric field inside a conductor in electrostatic equilibrium? A: Zero. Charges redistribute to cancel any internal field. Q14: How does the electric field behave near a charged infinite plane? A: The field is uniform and given by E = Ã 2 µ 0 E = frac{sigma}{2varepsilon_0} . Q15: If a charge is outside a closed Gaussian surface, how much flux does it contribute? A: Zero, because it does not contribute to the enclosed charge. 4. Electric Potential & Potential Energy Q16: What is electric potential? A: The electric potential at a point is the potential energy per unit charge: V = U q V = frac{U}{q} . Q17: How does potential difference relate to electric field? A: V = + E Å d r Delta V = - int E cdot dr , meaning electric potential decreases in the direction of the electric field. Q18: Why is electric potential a scalar while the electric field is a vector? A: Potential depends only on magnitude, while the field has both magnitude and direction. Q19: How does the work done by an electric field relate to potential difference? A: Work is given by W = q V W = q Delta V , meaning a charge moves from higher to lower potential. Q20: Can two points have the same electric potential but different electric fields? A: Yes. Potential can be constant while the field varies in different directions. 5. Conductors & Capacitance Q21: What happens when a conductor is placed in an external electric field? A: Free electrons move to cancel the field inside the conductor. Q22: How does a capacitor store energy? A: It stores energy in the electric field between plates: U = 1 2 C V 2 U = frac{1}{2} C V^2 . Q23: Why does inserting a dielectric into a capacitor increase its capacitance? A: A dielectric reduces the electric field, allowing the capacitor to hold more charge at the same voltage. Q24: What happens if you connect a conductor to a charged capacitor? A: The conductor will equalize its potential with the capacitor. Q25: Why is the potential the same everywhere on a conductor in electrostatic equilibrium? A: If there were differences, charge would flow until equilibrium is reached. 6. Miscellaneous Questions Q26: How does a dipole behave in a uniform electric field? A: It experiences no net force but feels a torque that aligns it with the field. Q27: How does an electron move when released in a uniform electric field? A: It acceler
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Compatible OS 3.0 et ultérieurs.
<<
Comprehensive Conceptual Questions & Answers for Midterm Review 1. Electric Charge & Coulombs Law Q1: What are the two types of electric charge, and how do they interact? A: There are positive and negative charges. Like charges repel, and opposite charges attract. This is due to the electric force described by Coulombs Law. Q2: What is the difference between conductors and insulators? A: Conductors allow free movement of charge (e.g., metals), while insulators hold charges in place (e.g., rubber, glass). Q3: How does Coulombs Law describe the force between two charges? A: Coulombs Law states that the force between two charges is given by: F = k q 1 q 2 r 2 F = frac{k q_1 q_2}{r^2} where k k is Coulombs constant, q 1 q_1 and q 2 q_2 are the charges, and r r is the distance between them. Q4: What happens to the force if the distance between two charges is doubled? A: Since force is inversely proportional to the square of distance, doubling r r reduces the force to 1 4 frac{1}{4} of its original value. Q5: Can a neutral object be attracted to a charged object? Why? A: Yes. A neutral object can experience polarization, where charge redistribution creates local attraction. 2. Electric Field Q6: What is an electric field? A: An electric field describes the force per unit charge experienced by a small test charge. It is given by E = F q E = frac{F}{q} . Q7: What is the direction of an electric field produced by a positive charge? A: The field radiates outward from a positive charge and inward toward a negative charge. Q8: How does the principle of superposition apply to electric fields? A: The total electric field at a point is the vector sum of the electric fields due to individual charges. Q9: Why do electric field lines never cross? A: If they did, a charge at that point would experience two different directions of force simultaneously, which is impossible. Q10: If the net electric field at a point is zero, what does that imply about surrounding charges? A: It means that the contributions from all nearby charges cancel out at that specific location. 3. Gausss Law & Electric Flux Q11: What is Gausss Law in mathematical form? A: Gausss Law states that the total electric flux through a closed surface is proportional to the charge enclosed: ¦ E = . E Å d A = Q e n c µ 0 Phi_E = oint E cdot dA = frac{Q_{enc}}{varepsilon_0} Q12: How does symmetry help in using Gausss Law? A: Gausss Law is easiest to apply when there is high symmetry (spherical, cylindrical, or planar), allowing the electric field to be factored out. Q13: What is the electric field inside a conductor in electrostatic equilibrium? A: Zero. Charges redistribute to cancel any internal field. Q14: How does the electric field behave near a charged infinite plane? A: The field is uniform and given by E = Ã 2 µ 0 E = frac{sigma}{2varepsilon_0} . Q15: If a charge is outside a closed Gaussian surface, how much flux does it contribute? A: Zero, because it does not contribute to the enclosed charge. 4. Electric Potential & Potential Energy Q16: What is electric potential? A: The electric potential at a point is the potential energy per unit charge: V = U q V = frac{U}{q} . Q17: How does potential difference relate to electric field? A: V = + E Å d r Delta V = - int E cdot dr , meaning electric potential decreases in the direction of the electric field. Q18: Why is electric potential a scalar while the electric field is a vector? A: Potential depends only on magnitude, while the field has both magnitude and direction. Q19: How does the work done by an electric field relate to potential difference? A: Work is given by W = q V W = q Delta V , meaning a charge moves from higher to lower potential. Q20: Can two points have the same electric potential but different electric fields? A: Yes. Potential can be constant while the field varies in different directions. 5. Conductors & Capacitance Q21: What happens when a conductor is placed in an external electric field? A: Free electrons move to cancel the field inside the conductor. Q22: How does a capacitor store energy? A: It stores energy in the electric field between plates: U = 1 2 C V 2 U = frac{1}{2} C V^2 . Q23: Why does inserting a dielectric into a capacitor increase its capacitance? A: A dielectric reduces the electric field, allowing the capacitor to hold more charge at the same voltage. Q24: What happens if you connect a conductor to a charged capacitor? A: The conductor will equalize its potential with the capacitor. Q25: Why is the potential the same everywhere on a conductor in electrostatic equilibrium? A: If there were differences, charge would flow until equilibrium is reached. 6. Miscellaneous Questions Q26: How does a dipole behave in a uniform electric field? A: It experiences no net force but feels a torque that aligns it with the field. Q27: How does an electron move when released in a uniform electric field? A: It acceler
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