Quiz — Devoir N°1trim2_3a sc exp 07-08.pdf

Question 1 sur 10 20:00

[{"id":20339,"question":"Quel est le produit de la réaction entre le zinc et l'acide chlorhydrique ?","option_a":"Hydrogène et chlorure de zinc","option_b":"Oxygène et eau","option_c":"Dioxyde de carbone et eau","option_d":"Azote et chlorure de zinc","option_e":"","option_f":"","bonne_reponse":"a","explication":"La réaction du zinc (Zn) avec l'acide chlorhydrique (HCl) produit du dihydrogène (H₂) et du chlorure de zinc (ZnCl₂).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Hydrogène et chlorure de zinc\", \"b\": \"Oxygène et eau\", \"c\": \"Di","_debug_options_count":4},{"id":20340,"question":"La tension aux bornes d'un conducteur ohmique est proportionnelle à l'intensité du courant qui le traverse.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"C'est la loi d'Ohm : 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\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":20341,"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 est l'appareil utilisé pour mesurer l'intensité du courant électrique en ampères (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\": \"Voltmètre\", \"b\": \"Ampèremètre\", \"c\": \"Ohmmètre\", \"d\": \"Géné","_debug_options_count":4},{"id":20342,"question":"La force de frottement s'oppose toujours au mouvement d'un objet.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La force de frottement s'oppose au mouvement relatif entre deux surfaces en contact.","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":20343,"question":"Quelle est l'unité de mesure de la résistance électrique ?","option_a":"Volt (V)","option_b":"Ampère (A)","option_c":"Ohm (Ω)","option_d":"Watt (W)","option_e":"","option_f":"","bonne_reponse":"c","explication":"La résistance électrique s'exprime en ohms (Ω), d'après la loi d'Ohm.","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\": \"Ohm (Ω)\", \"d\": \"Watt (W)\"}}","_debug_options_count":4},{"id":20344,"question":"Dans un circuit en série, l'intensité du courant est 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 en tout point du circuit.","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":20345,"question":"Quel gaz est produit lors de l'électrolyse de l'eau ?","option_a":"Dioxygène et dihydrogène","option_b":"Dioxyde de carbone","option_c":"Ammoniac","option_d":"Chlore","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'électrolyse de l'eau produit du dioxygène (O₂) à l'anode et du dihydrogène (H₂) à la cathode.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Dioxygène et dihydrogène\", \"b\": \"Dioxyde de carbone\", \"c\": \"Amm","_debug_options_count":4},{"id":20346,"question":"La vitesse d'un objet en mouvement circulaire uniforme est constante.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"La vitesse est constante en valeur, mais sa direction change constamment (accélération centripète).","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":20347,"question":"Quelle est la formule de la pression ?","option_a":"P = F × S","option_b":"P = F \/ S","option_c":"P = m × g","option_d":"P = ρ × g × h","option_e":"","option_f":"","bonne_reponse":"b","explication":"La pression (P) est définie comme la force (F) divisée par la surface (S) sur laquelle elle s'applique : P = F \/ S.","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 = F × S\", \"b\": \"P = F \/ S\", \"c\": \"P = m × g\", \"d\": \"P = ρ ×","_debug_options_count":4},{"id":20348,"question":"Dans un circuit en dérivation, la tension est la même aux bornes de chaque dipôle.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Dans un circuit en dérivation, la tension aux bornes de chaque dipôle est égale à la tension du générateur.","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}]