Ecrit par ✅ Quiz : Force De Laplace
Ce quiz contient 20 questions.
Note : Placeholder pour valider la structure. Le JSON converti est conservé ci-dessous pour l’import final des vraies questions Tutor LMS.
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{
"quiz_title": "Force De Laplace",
"quiz_slug": "03_force_de_laplace_quiz",
"quiz_description": "Quiz Edu509 : Force De Laplace",
"quiz_settings": {
"time_limit": {
"time_value": 0,
"time_type": "minutes"
},
"hide_quiz_time_display": false,
"attempts_allowed": 0,
"passing_grade": 70,
"max_questions_for_answer": 0,
"questions_order": "rand",
"hide_question_number_overview": false,
"short_answer_characters_limit": 200
},
"questions": [
{
"question_order": 1,
"question_title": "Un fil de longueur \\\\( 0{,}40\\\\ \\\\mathrm{m} \\\\) est parcouru par un courant de \\\\( 2{,}0\\\\ \\\\mathrm{A} \\\\) et placé dans un champ magnétique uniforme de \\\\( 0{,}50\\\\ \\\\mathrm{T} \\\\), perpendiculairement au champ. Quelle est la force de Laplace exercée sur le fil ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "La formule simplifiée s'applique car le fil est perpendiculaire au champ : \\\\( F = I \\\\cdot l \\\\cdot B = 2{,}0 \\\\times 0{,}40 \\\\times 0{,}50 = 0{,}40\\\\ \\\\mathrm{N} \\\\).",
"answers": [
{
"answer_title": "\\\\( 0{,}40\\\\ \\\\mathrm{N} \\\\)",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "\\\\( 0{,}20\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "\\\\( 0{,}25\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "\\\\( 0{,}80\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 2,
"question_title": "Quel est le rôle de l’angle \\\\( \\\\theta \\\\) dans la formule de la force de Laplace \\\\( F = I \\\\cdot l \\\\cdot B \\\\cdot \\\\sin(\\\\theta) \\\\) ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "L’angle \\\\( \\\\theta \\\\) permet de calculer la composante de la force perpendiculaire au champ magnétique et au courant, via \\\\( \\\\sin(\\\\theta) \\\\).",
"answers": [
{
"answer_title": "Il détermine la composante efficace de la force selon l’orientation du fil.",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "Il donne la direction du courant.",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "Il modifie la valeur du champ magnétique.",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "Il change l’unité de la force.",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 3,
"question_title": "Un fil de \\\\( 1{,}0\\\\ \\\\mathrm{m} \\\\) est parcouru par un courant de \\\\( 5{,}0\\\\ \\\\mathrm{A} \\\\) dans un champ magnétique de \\\\( 0{,}10\\\\ \\\\mathrm{T} \\\\). L’angle entre le fil et le champ est \\\\( 30^\\\\circ \\\\). Quelle est la force de Laplace ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "On utilise \\\\( F = I \\\\cdot l \\\\cdot B \\\\cdot \\\\sin(30^\\\\circ) = 5{,}0 \\\\times 1{,}0 \\\\times 0{,}10 \\\\times 0{,}5 = 0{,}25\\\\ \\\\mathrm{N} \\\\).",
"answers": [
{
"answer_title": "\\\\( 0{,}25\\\\ \\\\mathrm{N} \\\\)",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "\\\\( 0{,}50\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "\\\\( 0{,}43\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "\\\\( 0{,}10\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 4,
"question_title": "Si le courant dans un fil est inversé, que se passe-t-il pour la force de Laplace ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "L’inversion du courant inverse le sens de la force de Laplace, mais sa valeur absolue reste identique.",
"answers": [
{
"answer_title": "La force garde la même valeur mais change de sens.",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "La force devient nulle.",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "La force double.",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "La force ne change pas de sens.",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 5,
"question_title": "Un fil de \\\\( 0{,}75\\\\ \\\\mathrm{m} \\\\) est parcouru par un courant de \\\\( 3{,}0\\\\ \\\\mathrm{A} \\\\) dans un champ magnétique de \\\\( 0{,}20\\\\ \\\\mathrm{T} \\\\), angle \\\\( 90^\\\\circ \\\\). Quelle est la force de Laplace ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "Le fil est perpendiculaire au champ, donc \\\\( F = I \\\\cdot l \\\\cdot B = 3{,}0 \\\\times 0{,}75 \\\\times 0{,}20 = 0{,}45\\\\ \\\\mathrm{N} \\\\).",
"answers": [
{
"answer_title": "\\\\( 0{,}45\\\\ \\\\mathrm{N} \\\\)",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "\\\\( 0{,}30\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "\\\\( 0{,}15\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "\\\\( 0{,}60\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 6,
"question_title": "Quelle est l’unité de la force de Laplace dans le Système International ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "La force de Laplace s’exprime en Newton (\\\\( \\\\mathrm{N} \\\\)), unité de force dans le SI.",
"answers": [
{
"answer_title": "Newton (\\\\( \\\\mathrm{N} \\\\))",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "Tesla (\\\\( \\\\mathrm{T} \\\\))",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "Ampère (\\\\( \\\\mathrm{A} \\\\))",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "Joule (\\\\( \\\\mathrm{J} \\\\))",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 7,
"question_title": "Un fil de \\\\( 0{,}60\\\\ \\\\mathrm{m} \\\\) est parcouru par un courant de \\\\( 2{,}5\\\\ \\\\mathrm{A} \\\\) dans un champ magnétique de \\\\( 0{,}40\\\\ \\\\mathrm{T} \\\\), angle \\\\( 45^\\\\circ \\\\). Quelle est la force de Laplace ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "On applique \\\\( F = I \\\\cdot l \\\\cdot B \\\\cdot \\\\sin(45^\\\\circ) = 2{,}5 \\\\times 0{,}60 \\\\times 0{,}40 \\\\times 0{,}707 \\\\approx 0{,}42\\\\ \\\\mathrm{N} \\\\).",
"answers": [
{
"answer_title": "\\\\( 0{,}42\\\\ \\\\mathrm{N} \\\\)",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "\\\\( 0{,}60\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "\\\\( 0{,}24\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "\\\\( 0{,}85\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 8,
"question_title": "Si l’angle entre le fil et le champ magnétique est \\\\( 0^\\\\circ \\\\), que vaut la force de Laplace ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "Pour \\\\( \\\\theta = 0^\\\\circ \\\\), \\\\( \\\\sin(0^\\\\circ) = 0 \\\\), donc la force de Laplace est nulle.",
"answers": [
{
"answer_title": "La force est nulle.",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "La force est maximale.",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "La force double.",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "La force est négative.",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 9,
"question_title": "Un fil de \\\\( 1{,}2\\\\ \\\\mathrm{m} \\\\) est parcouru par un courant de \\\\( 4{,}0\\\\ \\\\mathrm{A} \\\\) dans un champ magnétique de \\\\( 0{,}15\\\\ \\\\mathrm{T} \\\\), angle \\\\( 60^\\\\circ \\\\). Quelle est la force de Laplace ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "On utilise \\\\( F = 4{,}0 \\\\times 1{,}2 \\\\times 0{,}15 \\\\times 0{,}866 \\\\approx 0{,}62\\\\ \\\\mathrm{N} \\\\).",
"answers": [
{
"answer_title": "\\\\( 0{,}62\\\\ \\\\mathrm{N} \\\\)",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "\\\\( 0{,}72\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "\\\\( 0{,}48\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "\\\\( 0{,}86\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 10,
"question_title": "Dans la formule vectorielle \\\\( \\\\vec{F} = I \\\\cdot \\\\vec{l} \\\\wedge \\\\vec{B} \\\\), que représente le produit vectoriel \\\\( \\\\wedge \\\\) ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "Le produit vectoriel donne une force perpendiculaire à la fois au courant et au champ magnétique.",
"answers": [
{
"answer_title": "Une force perpendiculaire au courant et au champ.",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "Une addition des vecteurs.",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "Une multiplication scalaire.",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "Une inversion du courant.",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 11,
"question_title": "Un fil de \\\\( 0{,}50\\\\ \\\\mathrm{m} \\\\) est parcouru par un courant de \\\\( 1{,}0\\\\ \\\\mathrm{A} \\\\) dans un champ magnétique de \\\\( 0{,}60\\\\ \\\\mathrm{T} \\\\), angle \\\\( 90^\\\\circ \\\\). Quelle est la force de Laplace ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "On applique \\\\( F = 1{,}0 \\\\times 0{,}50 \\\\times 0{,}60 = 0{,}30\\\\ \\\\mathrm{N} \\\\).",
"answers": [
{
"answer_title": "\\\\( 0{,}30\\\\ \\\\mathrm{N} \\\\)",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "\\\\( 0{,}60\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "\\\\( 0{,}50\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "\\\\( 0{,}10\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 12,
"question_title": "Si le champ magnétique est doublé, que devient la force de Laplace pour un même courant et une même longueur de fil ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "La force de Laplace est proportionnelle à \\\\( B \\\\), donc si \\\\( B \\\\) double, la force double aussi.",
"answers": [
{
"answer_title": "La force double.",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "La force est divisée par deux.",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "La force ne change pas.",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "La force devient nulle.",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 13,
"question_title": "Un fil de \\\\( 0{,}80\\\\ \\\\mathrm{m} \\\\) est parcouru par un courant de \\\\( 2{,}0\\\\ \\\\mathrm{A} \\\\) dans un champ magnétique de \\\\( 0{,}25\\\\ \\\\mathrm{T} \\\\), angle \\\\( 90^\\\\circ \\\\). Quelle est la force de Laplace ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "On applique \\\\( F = 2{,}0 \\\\times 0{,}80 \\\\times 0{,}25 = 0{,}40\\\\ \\\\mathrm{N} \\\\).",
"answers": [
{
"answer_title": "\\\\( 0{,}40\\\\ \\\\mathrm{N} \\\\)",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "\\\\( 0{,}20\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "\\\\( 0{,}16\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "\\\\( 0{,}80\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 14,
"question_title": "Quel est le sens de la force de Laplace selon la règle des trois doigts de la main droite ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "La règle des trois doigts donne : pouce (courant), index (champ), majeur (force).",
"answers": [
{
"answer_title": "Pouce : courant, index : champ, majeur : force.",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "Pouce : champ, index : courant, majeur : force.",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "Pouce : force, index : courant, majeur : champ.",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "Pouce : courant, index : force, majeur : champ.",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 15,
"question_title": "Un fil de \\\\( 0{,}90\\\\ \\\\mathrm{m} \\\\) est parcouru par un courant de \\\\( 1{,}5\\\\ \\\\mathrm{A} \\\\) dans un champ magnétique de \\\\( 0{,}35\\\\ \\\\mathrm{T} \\\\), angle \\\\( 60^\\\\circ \\\\). Quelle est la force de Laplace ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "On applique \\\\( F = 1{,}5 \\\\times 0{,}90 \\\\times 0{,}35 \\\\times 0{,}866 \\\\approx 0{,}41\\\\ \\\\mathrm{N} \\\\).",
"answers": [
{
"answer_title": "\\\\( 0{,}41\\\\ \\\\mathrm{N} \\\\)",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "\\\\( 0{,}47\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "\\\\( 0{,}32\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "\\\\( 0{,}54\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 16,
"question_title": "Un fil de \\\\( 0{,}50\\\\ \\\\mathrm{m} \\\\) est parcouru par un courant de \\\\( 2{,}0\\\\ \\\\mathrm{A} \\\\) dans un champ magnétique de \\\\( 0{,}20\\\\ \\\\mathrm{T} \\\\), angle \\\\( 0^\\\\circ \\\\). Quelle est la force de Laplace ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "Pour \\\\( \\\\theta = 0^\\\\circ \\\\), \\\\( \\\\sin(0^\\\\circ) = 0 \\\\), donc \\\\( F = 0 \\\\).",
"answers": [
{
"answer_title": "\\\\( 0 \\\\)",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "\\\\( 0{,}20\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "\\\\( 0{,}10\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "\\\\( 0{,}50\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 17,
"question_title": "Un fil de \\\\( 0{,}60\\\\ \\\\mathrm{m} \\\\) est parcouru par un courant de \\\\( 1{,}5\\\\ \\\\mathrm{A} \\\\) dans un champ magnétique de \\\\( 0{,}25\\\\ \\\\mathrm{T} \\\\), angle \\\\( 45^\\\\circ \\\\). Quelle est la force de Laplace ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "On applique \\\\( F = 1{,}5 \\\\times 0{,}60 \\\\times 0{,}25 \\\\times 0{,}707 \\\\approx 0{,}16\\\\ \\\\mathrm{N} \\\\).",
"answers": [
{
"answer_title": "\\\\( 0{,}16\\\\ \\\\mathrm{N} \\\\)",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "\\\\( 0{,}11\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "\\\\( 0{,}22\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "\\\\( 0{,}09\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 18,
"question_title": "Si la longueur du fil est multipliée par 3, que devient la force de Laplace (tous les autres paramètres constants) ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "La force de Laplace est proportionnelle à la longueur du fil, donc elle est multipliée par 3.",
"answers": [
{
"answer_title": "La force est multipliée par 3.",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "La force est divisée par 3.",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "La force ne change pas.",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "La force est multipliée par 9.",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 19,
"question_title": "Un fil de \\\\( 0{,}70\\\\ \\\\mathrm{m} \\\\) est parcouru par un courant de \\\\( 2{,}2\\\\ \\\\mathrm{A} \\\\) dans un champ magnétique de \\\\( 0{,}40\\\\ \\\\mathrm{T} \\\\), angle \\\\( 90^\\\\circ \\\\). Quelle est la force de Laplace ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "On applique \\\\( F = 2{,}2 \\\\times 0{,}70 \\\\times 0{,}40 = 0{,}62\\\\ \\\\mathrm{N} \\\\).",
"answers": [
{
"answer_title": "\\\\( 0{,}62\\\\ \\\\mathrm{N} \\\\)",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "\\\\( 0{,}44\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "\\\\( 0{,}88\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "\\\\( 0{,}31\\\\ \\\\mathrm{N} \\\\)",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 20,
"question_title": "Parmi les grandeurs suivantes, lesquelles influencent la force de Laplace ?",
"question_type": "multiple_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "La force de Laplace dépend de l’intensité du courant, de la longueur du fil, du champ magnétique et de l’angle entre fil et champ.",
"answers": [
{
"answer_title": "Intensité du courant",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "Longueur du fil",
"is_correct": true,
"answer_order": 2
},
{
"answer_title": "Champ magnétique",
"is_correct": true,
"answer_order": 3
},
{
"answer_title": "Angle entre fil et champ",
"is_correct": true,
"answer_order": 4
}
]
}
]
}