Quiz — bac-pratique-21052015-sc-16h-s1.pdf

Question 1 sur 10 20:00

[{"id":135048,"question":"Quelle est la formule de la loi d'Ohm ?","option_a":"U = R × I","option_b":"P = U × I","option_c":"F = m × a","option_d":"E = m × c²","option_e":"","option_f":"","bonne_reponse":"a","explication":"La loi d'Ohm s'exprime par 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\": \"P = U × I\", \"c\": \"F = m × a\", \"d\": \"E = m ×","_debug_options_count":4},{"id":135049,"question":"Un atome est électriquement neutre car il contient autant de protons que d'électrons.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Vrai. Un atome est électriquement neutre car le nombre de protons (chargés positivement) est égal au nombre 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":135050,"question":"Quel est le rôle principal des chloroplastes dans une cellule végétale ?","option_a":"Stocker l'énergie sous forme de glucose","option_b":"Effectuer la photosynthèse","option_c":"Synthétiser les protéines","option_d":"Assurer la respiration cellulaire","option_e":"","option_f":"","bonne_reponse":"b","explication":"Les chloroplastes sont les organites responsables de la photosynthèse, un processus qui permet de convertir l'énergie lumineuse en énergie chimique (glucose).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Stocker l'énergie sous forme de glucose\", \"b\": \"Effectuer la pho","_debug_options_count":4},{"id":135051,"question":"La poussée d'Archimède s'exerce toujours vers le haut.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Vrai. La poussée d'Archimède est une force verticale dirigée vers le haut, qui s'applique à tout corps immergé dans un fluide.","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":135052,"question":"Quelle est l'unité de mesure de la puissance électrique ?","option_a":"Le watt (W)","option_b":"Le joule (J)","option_c":"Le volt (V)","option_d":"L'ampère (A)","option_e":"","option_f":"","bonne_reponse":"a","explication":"La puissance électrique s'exprime en watts (W), symbole P, et se calcule par P = U × I.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Le watt (W)\", \"b\": \"Le joule (J)\", \"c\": \"Le volt (V)\", \"d\": \"L'am","_debug_options_count":4},{"id":135053,"question":"La mitose permet de produire des gamètes haploïdes.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Faux. La mitose produit des cellules diploïdes identiques à la cellule mère, tandis que la méiose produit des gamètes haploïdes.","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":135054,"question":"Quel est le symbole chimique de l'élément oxygène ?","option_a":"O","option_b":"Ox","option_c":"Og","option_d":"O2","option_e":"","option_f":"","bonne_reponse":"a","explication":"Le symbole chimique de l'oxygène est O. O2 représente la molécule de dioxygène, composée de deux atomes d'oxygène.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"O\", \"b\": \"Ox\", \"c\": \"Og\", \"d\": \"O2\"}}","_debug_options_count":4},{"id":135055,"question":"La loi de conservation de l'énergie s'applique-t-elle dans tous les systèmes physiques ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Vrai. La loi de conservation de l'énergie stipule que l'énergie ne peut être ni créée ni détruite, seulement transformée ou transférée.","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":135056,"question":"Quelle est la formule chimique de l'eau ?","option_a":"H2O","option_b":"CO2","option_c":"NaCl","option_d":"CH4","option_e":"","option_f":"","bonne_reponse":"a","explication":"La formule chimique de l'eau est H2O, composée de deux atomes d'hydrogène et d'un atome d'oxygène.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"H2O\", \"b\": \"CO2\", \"c\": \"NaCl\", \"d\": \"CH4\"}}","_debug_options_count":4},{"id":135057,"question":"Un acide est une espèce chimique capable de libérer des ions H+ en solution aqueuse.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Vrai. Selon la théorie de Brønsted-Lowry, un acide est une espèce chimique capable de céder un proton (H+).","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}]