Quiz — Lycée Pilote Sfax - DC 3 2015.pdf

Question 1 sur 10 20:00

[{"id":15579,"question":"Quelle est l'unité de la force dans le système international ?","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 est le Newton (N), en hommage à Isaac Newton. 1 N correspond à la force nécessaire pour accélérer une masse de 1 kg à 1 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\": \"Joule (J)\", \"c\": \"Watt (W)\", \"d\": \"Pascal (Pa)","_debug_options_count":4},{"id":15580,"question":"La tension électrique se mesure avec un voltmètre branché en série.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Faux. Le voltmètre se branche en parallèle pour mesurer la tension aux bornes d'un dipôle.","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":15581,"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 de 7, la solution est acide ; au-dessus, elle est 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":15582,"question":"La loi d'Ohm s'écrit :","option_a":"U = R × I","option_b":"P = U × I","option_c":"E = m × g × h","option_d":"F = m × a","option_e":"","option_f":"","bonne_reponse":"a","explication":"La loi d'Ohm relie la tension (U), la résistance (R) et l'intensité (I) par la formule U = R × 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\": \"U = R × I\", \"b\": \"P = U × I\", \"c\": \"E = m × g × h\", \"d\": \"F =","_debug_options_count":4},{"id":15583,"question":"Une réaction chimique est 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":"Vrai. Une réaction exothermique libère de l'énergie sous forme de chaleur.","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":15584,"question":"Quelle est la formule de l'énergie cinétique ?","option_a":"E_c = ½ m v²","option_b":"E_p = m g h","option_c":"E = P × t","option_d":"F = m a","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'énergie cinétique d'un objet en mouvement est donnée par E_c = ½ m v², où m est la masse et v la vitesse.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"E_c = ½ m v²\", \"b\": \"E_p = m g h\", \"c\": \"E = P × t\", \"d\": \"F =","_debug_options_count":4},{"id":15585,"question":"Le courant électrique est dû au déplacement des :","option_a":"Protons","option_b":"Neutrons","option_c":"Électrons","option_d":"Atomes","option_e":"","option_f":"","bonne_reponse":"c","explication":"Le courant électrique est dû au déplacement des électrons dans un conducteur métallique.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"Protons\", \"b\": \"Neutrons\", \"c\": \"Électrons\", \"d\": \"Atomes\"}}","_debug_options_count":4},{"id":15586,"question":"La fréquence d'une onde sonore est mesurée en :","option_a":"Hertz (Hz)","option_b":"Mètres (m)","option_c":"Secondes (s)","option_d":"Watts (W)","option_e":"","option_f":"","bonne_reponse":"a","explication":"La fréquence d'une onde sonore s'exprime en Hertz (Hz), qui correspond au nombre d'oscillations par seconde.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Hertz (Hz)\", \"b\": \"Mètres (m)\", \"c\": \"Secondes (s)\", \"d\": \"Watts","_debug_options_count":4},{"id":15587,"question":"Une solution acide a un pH :","option_a":"Supérieur à 7","option_b":"Égal à 7","option_c":"Inférieur à 7","option_d":"Nul","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\": \"Supérieur à 7\", \"b\": \"Égal à 7\", \"c\": \"Inférieur à 7\", \"d\":","_debug_options_count":4},{"id":15588,"question":"La troisième loi de Newton stipule que :","option_a":"L'action est égale à la réaction","option_b":"Tout corps persévère dans son état de repos","option_c":"F = m a","option_d":"L'énergie se conserve","option_e":"","option_f":"","bonne_reponse":"a","explication":"La troisième loi de Newton énonce que si un corps A exerce une force sur un corps B, alors B exerce une force de même intensité mais de sens opposé sur A.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"L'action est égale à la réaction\", \"b\": \"Tout corps persévèr","_debug_options_count":4}]