Quiz — DC2 (1).pdf

Question 1 sur 10 20:00

[{"id":9663,"question":"Quelle loi physique relie la force, la masse et l'accélération ?","option_a":"Loi de Coulomb","option_b":"Loi de Newton","option_c":"Loi d'Ohm","option_d":"Loi de Lavoisier","option_e":"","option_f":"","bonne_reponse":"b","explication":"La deuxième loi de Newton (F = m × a) établit cette relation fondamentale en mécanique.","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\", \"c\": \"Loi d'Ohm\", \"d\": \"Lo","_debug_options_count":4},{"id":9664,"question":"Dans un circuit électrique en série, l'intensité du courant est-elle la même dans tous les dipôles ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Dans un circuit en série, l'intensité du courant est identique dans tous les dipôles, car il n'y a qu'un seul chemin pour le courant.","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":9665,"question":"Quelle est l'unité de la résistance électrique dans le système international ?","option_a":"Ampère (A)","option_b":"Volt (V)","option_c":"Ohm (Ω)","option_d":"Watt (W)","option_e":"","option_f":"","bonne_reponse":"c","explication":"L'unité de la résistance électrique est l'Ohm (Ω), d'après la loi d'Ohm (U = R × I).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"Ampère (A)\", \"b\": \"Volt (V)\", \"c\": \"Ohm (Ω)\", \"d\": \"Watt (W)\"}}","_debug_options_count":4},{"id":9666,"question":"Une réaction chimique est-elle toujours exothermique ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Une réaction chimique peut être exothermique (dégage de la chaleur) ou endothermique (absorbe de la chaleur).","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":9667,"question":"Quel est le nom de la force qui s'oppose au mouvement d'un objet dans un fluide ?","option_a":"Force de tension","option_b":"Force de frottement","option_c":"Force normale","option_d":"Force électrostatique","option_e":"","option_f":"","bonne_reponse":"b","explication":"La force de frottement s'oppose au mouvement d'un objet dans un fluide ou sur une surface.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Force de tension\", \"b\": \"Force de frottement\", \"c\": \"Force normal","_debug_options_count":4},{"id":9668,"question":"Dans une solution acide, le pH est-il inférieur à 7 ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Le pH d'une solution acide est inférieur à 7, car elle contient plus d'ions H+ que d'ions OH-.","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":9669,"question":"Quelle est la formule de la puissance électrique (P) en fonction de la tension (U) et de l'intensité (I) ?","option_a":"P = U × I","option_b":"P = U \/ I","option_c":"P = R × I²","option_d":"P = U² \/ R","option_e":"","option_f":"","bonne_reponse":"a","explication":"La puissance électrique se calcule avec la formule 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\": \"a\", \"options\": {\"a\": \"P = U × I\", \"b\": \"P = U \/ I\", \"c\": \"P = R × I²\", \"d\": \"P = U²","_debug_options_count":4},{"id":9670,"question":"Un atome est-il électriquement neutre ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Un atome est électriquement neutre car il contient autant de protons (chargés positivement) que d'électrons (chargés négativement).","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":9671,"question":"Quelle est la relation entre la tension (U), la résistance (R) et l'intensité (I) dans un circuit électrique ?","option_a":"U = R × I","option_b":"U = R \/ I","option_c":"U = I \/ R","option_d":"U = R + I","option_e":"","option_f":"","bonne_reponse":"a","explication":"La loi d'Ohm établit que U = R × I, où U est la tension, R la résistance 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\": \"a\", \"options\": {\"a\": \"U = R × I\", \"b\": \"U = R \/ I\", \"c\": \"U = I \/ R\", \"d\": \"U = R + I\"","_debug_options_count":4},{"id":9672,"question":"Quel est le nom du phénomène qui se produit lorsqu'un corps passe de l'état solide à l'état gazeux sans passer par l'état liquide ?","option_a":"Fusion","option_b":"Vaporisation","option_c":"Sublimation","option_d":"Condensation","option_e":"","option_f":"","bonne_reponse":"c","explication":"La sublimation est le passage direct de l'état solide à l'état gazeux, sans étape liquide.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"Fusion\", \"b\": \"Vaporisation\", \"c\": \"Sublimation\", \"d\": \"Condensat","_debug_options_count":4}]