Quiz — correction 1 exam 2 AS.pdf

Question 1 sur 10 20:00

[{"id":30200,"question":"Quelle est l'unité de mesure de la force dans le système international (SI) ?","option_a":"Newton (N)","option_b":"Pascal (Pa)","option_c":"Joule (J)","option_d":"Watt (W)","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'unité de force dans le SI est le Newton (N), du nom d'Isaac Newton. 1 N = 1 kg·m\/s².","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Newton (N)\", \"b\": \"Pascal (Pa)\", \"c\": \"Joule (J)\", \"d\": \"Watt (W)","_debug_options_count":4},{"id":30201,"question":"La loi d'Ohm s'applique uniquement aux conducteurs ohmiques.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Vrai. La loi d'Ohm (U = R·I) ne s'applique qu'aux dipôles ohmiques, c'est-à-dire dont la résistance est constante.","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":30202,"question":"Quel est le symbole chimique de l'élément oxygène ?","option_a":"O","option_b":"Ox","option_c":"O2","option_d":"Oxy","option_e":"","option_f":"","bonne_reponse":"a","explication":"Le symbole chimique de l'oxygène est O. O2 représente sa forme moléculaire (dioxygène).","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\": \"O2\", \"d\": \"Oxy\"}}","_debug_options_count":4},{"id":30203,"question":"Une réaction chimique est exothermique si elle libère de l'énergie sous forme de chaleur.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Vrai. Une réaction exothermique libère de l'énergie (chaleur, lumière), contrairement à une réaction endothermique qui en absorbe.","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":30204,"question":"Quelle formule relie la vitesse (v), la distance (d) et le temps (t) ?","option_a":"v = d × t","option_b":"v = d \/ t","option_c":"v = t \/ d","option_d":"v = d + t","option_e":"","option_f":"","bonne_reponse":"b","explication":"La formule correcte est v = d \/ t. La vitesse est le rapport de la distance parcourue sur le temps écoulé.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"v = d × t\", \"b\": \"v = d \/ t\", \"c\": \"v = t \/ d\", \"d\": \"v = d + t\"","_debug_options_count":4},{"id":30205,"question":"Les acides ont un pH inférieur à 7.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Vrai. Un pH inférieur à 7 indique un milieu acide, tandis qu'un pH supérieur à 7 indique un milieu basique.","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":30206,"question":"Quel appareil mesure l'intensité du courant électrique ?","option_a":"Voltmètre","option_b":"Ampèremètre","option_c":"Ohmmètre","option_d":"Générateur","option_e":"","option_f":"","bonne_reponse":"b","explication":"L'ampèremètre mesure l'intensité du courant électrique (en ampères). Le voltmètre mesure la tension (en volts).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Voltmètre\", \"b\": \"Ampèremètre\", \"c\": \"Ohmmètre\", \"d\": \"Géné","_debug_options_count":4},{"id":30207,"question":"La photosynthèse permet aux plantes de produire du dioxygène.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Vrai. La photosynthèse est le processus par lequel les plantes, en présence de lumière, produisent du glucose et du dioxygène (O2) à partir de CO2 et d'eau.","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":30208,"question":"Quelle est la formule de l'énergie cinétique (Ec) d'un corps en mouvement ?","option_a":"Ec = m × v","option_b":"Ec = ½ × m × v²","option_c":"Ec = m × g × h","option_d":"Ec = F × d","option_e":"","option_f":"","bonne_reponse":"b","explication":"La formule de l'énergie cinétique est Ec = ½ × m × v², où m est la masse et v la vitesse du corps.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Ec = m × v\", \"b\": \"Ec = ½ × m × v²\", \"c\": \"Ec = m × g × h\"","_debug_options_count":4},{"id":30209,"question":"Les ions sont des atomes ou molécules qui ont gagné ou perdu des électrons.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Vrai. Un ion est une particule chargée (cation ou anion) formée par la perte ou le gain d'électrons.","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}]