Quiz — 55_serie- 9-PH 4 math -4 sc- karmous.pdf

Question 1 sur 10 20:00

[{"id":17489,"question":"Quelle est l'unité de la force dans le système international (SI) ?","option_a":"Newton (N)","option_b":"Joule (J)","option_c":"Watt (W)","option_d":"Pascal (Pa)","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'unité de la force dans le système international est le Newton (N), en hommage à Isaac Newton.","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\": \"Joule (J)\", \"c\": \"Watt (W)\", \"d\": \"Pascal (Pa)","_debug_options_count":4},{"id":17490,"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":"La loi d'Ohm (U = R × I) s'applique uniquement aux dipôles ohmiques, où 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":17491,"question":"Quel est le pH d'une solution neutre à 25°C ?","option_a":"pH = 0","option_b":"pH = 7","option_c":"pH = 14","option_d":"pH dépend de la température","option_e":"","option_f":"","bonne_reponse":"b","explication":"À 25°C, une solution neutre a un pH de 7. En dessous, elle est acide ; au-dessus, basique.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"pH = 0\", \"b\": \"pH = 7\", \"c\": \"pH = 14\", \"d\": \"pH dépend de la te","_debug_options_count":4},{"id":17492,"question":"La vitesse de la lumière dans le vide est d'environ :","option_a":"3 × 10^5 m\/s","option_b":"3 × 10^8 m\/s","option_c":"3 × 10^10 m\/s","option_d":"3 × 10^12 m\/s","option_e":"","option_f":"","bonne_reponse":"b","explication":"La vitesse de la lumière dans le vide est d'environ 3 × 10^8 m\/s, une constante fondamentale en physique.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"3 × 10^5 m\/s\", \"b\": \"3 × 10^8 m\/s\", \"c\": \"3 × 10^10 m\/s\", \"d\":","_debug_options_count":4},{"id":17493,"question":"Une réaction chimique est dite exothermique si elle libère de l'énergie.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Une réaction exothermique libère de l'énergie sous forme de chaleur, 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":17494,"question":"Quelle est la formule de la puissance électrique ?","option_a":"P = U × I","option_b":"P = R × I","option_c":"P = U \/ I","option_d":"P = U^2 \/ 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 = R × I\", \"c\": \"P = U \/ I\", \"d\": \"P = U^2 \/","_debug_options_count":4},{"id":17495,"question":"Un miroir convexe donne toujours une image :","option_a":"Réelle et droite","option_b":"Réelle et renversée","option_c":"Virtuelle et droite","option_d":"Virtuelle et renversée","option_e":"","option_f":"","bonne_reponse":"c","explication":"Un miroir convexe donne toujours une image virtuelle, droite et de taille réduite, quel que soit la position de l'objet.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"Réelle et droite\", \"b\": \"Réelle et renversée\", \"c\": \"Virtuelle","_debug_options_count":4},{"id":17496,"question":"La constante d'Avogadro représente :","option_a":"Le nombre d'atomes dans 12 g de carbone 12","option_b":"La charge d'un électron","option_c":"La vitesse de la lumière","option_d":"La constante de Planck","option_e":"","option_f":"","bonne_reponse":"a","explication":"La constante d'Avogadro (6,022 × 10^23 mol^-1) représente le nombre d'entités élémentaires (atomes, molécules) dans une mole de matière.","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 nombre d'atomes dans 12 g de carbone 12\", \"b\": \"La charge d'un","_debug_options_count":4},{"id":17497,"question":"La loi de conservation de l'énergie s'applique-t-elle en mécanique classique ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La loi de conservation de l'énergie est un principe fondamental en mécanique classique, où l'énergie totale (cinétique + potentielle) reste 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":17498,"question":"Quel est le produit ionique de l'eau à 25°C ?","option_a":"10^-7","option_b":"10^-14","option_c":"10^7","option_d":"10^14","option_e":"","option_f":"","bonne_reponse":"b","explication":"Le produit ionique de l'eau (Ke) à 25°C est de 10^-14, ce qui signifie que [H3O+] × [OH-] = 10^-14.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"10^-7\", \"b\": \"10^-14\", \"c\": \"10^7\", \"d\": \"10^14\"}}","_debug_options_count":4}]