Quiz — physique appliquee precis de physique chimie.pdf

Question 1 sur 5 10:00

[{"id":1052,"question":"Quelle est la relation entre la tension U, l'intensité I et la résistance R dans un circuit électrique ?","option_a":"U = R\/I","option_b":"U = R × I","option_c":"I = U × R","option_d":"R = U\/I","option_e":"","option_f":"","bonne_reponse":"b","explication":"La loi d'Ohm stipule que la tension U aux bornes d'un conducteur ohmique est égale au produit de sa résistance R par l'intensité I du courant qui le traverse : U = R × I.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"U = R\/I\", \"b\": \"U = R × I\", \"c\": \"I = U × R\", \"d\": \"R = U\/I\"}}","_debug_options_count":4},{"id":1053,"question":"Quel est le pH d'une solution acide ?","option_a":"pH \u003E 7","option_b":"pH = 7","option_c":"pH \u003C 7","option_d":"pH = 0","option_e":"","option_f":"","bonne_reponse":"c","explication":"Une solution acide a un pH inférieur à 7. Plus le pH est bas, plus l'acidité est forte.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"pH \u003E 7\", \"b\": \"pH = 7\", \"c\": \"pH \u003C 7\", \"d\": \"pH = 0\"}}","_debug_options_count":4},{"id":1054,"question":"Quelle est la formule de la force gravitationnelle entre deux corps de masses m1 et m2 séparés par une distance d ?","option_a":"F = G × (m1 + m2)\/d","option_b":"F = G × m1 × m2 \/ d²","option_c":"F = G × m1 × m2 × d","option_d":"F = G × (m1 × m2)² \/ d","option_e":"","option_f":"","bonne_reponse":"b","explication":"La loi de la gravitation universelle de Newton s'exprime par F = G × (m1 × m2) \/ d², où G est la constante de gravitation.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"F = G × (m1 + m2)\/d\", \"b\": \"F = G × m1 × m2 \/ d²\", \"c\": \"F = ","_debug_options_count":4},{"id":1055,"question":"Quel est le nom de la réaction chimique qui permet de transformer un alcane en alcène ?","option_a":"Hydrolyse","option_b":"Déshydratation","option_c":"Combustion","option_d":"Polymérisation","option_e":"","option_f":"","bonne_reponse":"b","explication":"La déshydratation d'un alcane (par exemple, l'éthane) permet d'obtenir un alcène (éthène) en éliminant une molécule d'eau.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Hydrolyse\", \"b\": \"Déshydratation\", \"c\": \"Combustion\", \"d\": \"Poly","_debug_options_count":4},{"id":1056,"question":"Quelle est l'unité SI de la puissance électrique ?","option_a":"Volt (V)","option_b":"Ampère (A)","option_c":"Watt (W)","option_d":"Joule (J)","option_e":"","option_f":"","bonne_reponse":"c","explication":"La puissance électrique s'exprime en watts (W) dans le système international d'unités.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"Volt (V)\", \"b\": \"Ampère (A)\", \"c\": \"Watt (W)\", \"d\": \"Joule (J)\"}","_debug_options_count":4}]