Quiz — Lycée Pilote Sousse - DC 2 2013.pdf

Question 1 sur 10 20:00

[{"id":11543,"question":"Quelle loi physique relie la force appliquée à un objet à son accélération ?","option_a":"Loi de Coulomb","option_b":"Loi de Newton (F = m.a)","option_c":"Loi de Joule","option_d":"Loi d'Ohm","option_e":"","option_f":"","bonne_reponse":"b","explication":"La 2ème loi de Newton stipule que la force nette appliquée à un objet est égale à sa masse multipliée par son accélération (F = m.a).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Loi de Coulomb\", \"b\": \"Loi de Newton (F = m.a)\", \"c\": \"Loi de Jou","_debug_options_count":4},{"id":11544,"question":"Dans un circuit électrique en série, la tension aux bornes de chaque dipôle est-elle la même ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Dans un circuit en série, la tension se répartit entre les dipôles. Ce sont les intensités qui sont identiques.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":11545,"question":"Quel est le pH d'une solution dont la concentration en ions H₃O⁺ est de 10⁻³ mol\/L ?","option_a":"pH = 1","option_b":"pH = 3","option_c":"pH = 5","option_d":"pH = 7","option_e":"","option_f":"","bonne_reponse":"b","explication":"Le pH est calculé par la formule pH = -log[H₃O⁺]. Ici, pH = -log(10⁻³) = 3.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"pH = 1\", \"b\": \"pH = 3\", \"c\": \"pH = 5\", \"d\": \"pH = 7\"}}","_debug_options_count":4},{"id":11546,"question":"La résistance d'un conducteur ohmique dépend-elle de sa longueur ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La résistance d'un conducteur ohmique dépend de sa longueur (R = ρ.L\/S), mais aussi de sa section et de la résistivité du matériau.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":11547,"question":"Quelle est l'unité SI de l'énergie cinétique ?","option_a":"Newton (N)","option_b":"Joule (J)","option_c":"Watt (W)","option_d":"Pascal (Pa)","option_e":"","option_f":"","bonne_reponse":"b","explication":"L'énergie cinétique s'exprime en Joules (J) dans le système international.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Newton (N)\", \"b\": \"Joule (J)\", \"c\": \"Watt (W)\", \"d\": \"Pascal (Pa)","_debug_options_count":4},{"id":11548,"question":"Une réaction acido-basique est-elle toujours exothermique ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Une réaction acido-basique peut être exothermique ou endothermique selon les réactifs impliqués.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":11549,"question":"Quelle formule relie la puissance électrique (P), la tension (U) et l'intensité (I) ?","option_a":"P = U + I","option_b":"P = U × I","option_c":"P = U \/ I","option_d":"P = I² × R","option_e":"","option_f":"","bonne_reponse":"b","explication":"La puissance électrique est donnée par P = U × I, où U est la tension et I l'intensité du courant.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"P = U + I\", \"b\": \"P = U × I\", \"c\": \"P = U \/ I\", \"d\": \"P = I² ×","_debug_options_count":4},{"id":11550,"question":"Le pH d'une solution neutre est-il égal à 7 à 25°C ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Le pH d'une solution neutre est égal à 7 uniquement à 25°C. Il varie avec la température.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":11551,"question":"Quelle est la relation entre l'énergie potentielle de pesanteur (Epp) et la hauteur (h) d'un objet ?","option_a":"Epp = m.g.h","option_b":"Epp = m.h","option_c":"Epp = g.h","option_d":"Epp = m.g","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'énergie potentielle de pesanteur est donnée par Epp = m.g.h, où m est la masse, g l'accélération de la pesanteur et h la hauteur.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Epp = m.g.h\", \"b\": \"Epp = m.h\", \"c\": \"Epp = g.h\", \"d\": \"Epp = m.g","_debug_options_count":4},{"id":11552,"question":"Un dosage pH-métrique permet-il de déterminer la concentration d'une solution acide ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Un dosage pH-métrique permet de suivre l'évolution du pH lors d'une réaction acido-basique, mais ne donne pas directement la concentration.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4}]