Quiz — كتاب تأشيرة النجاح في الفيزياء الجزء الثاني.pdf

Question 1 sur 10 20:00

[{"id":103807,"question":"Quelle est la formule de la vitesse moyenne ?","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 vitesse moyenne se calcule en divisant la distance parcourue (d) par le temps écoulé (t).","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":103808,"question":"L'énergie cinétique dépend uniquement de la masse de l'objet.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"L'énergie cinétique dépend à la fois de la masse et de la vitesse de l'objet (Ec = ½ m v²).","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":103809,"question":"Quelle loi relie la tension, l'intensité et la résistance dans un circuit électrique ?","option_a":"Loi de Joule","option_b":"Loi d'Ohm","option_c":"Loi de Newton","option_d":"Loi de Faraday","option_e":"","option_f":"","bonne_reponse":"b","explication":"La loi d'Ohm stipule que U = R × I, où U est la tension, R la résistance et I l'intensité.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Loi de Joule\", \"b\": \"Loi d'Ohm\", \"c\": \"Loi de Newton\", \"d\": \"Loi ","_debug_options_count":4},{"id":103810,"question":"Un objet en chute libre accélère à cause de :","option_a":"La force de frottement","option_b":"La force gravitationnelle","option_c":"La force électromagnétique","option_d":"La force nucléaire","option_e":"","option_f":"","bonne_reponse":"b","explication":"En chute libre, l'objet accélère sous l'effet de la force gravitationnelle (g ≈ 9,81 m\/s²).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"La force de frottement\", \"b\": \"La force gravitationnelle\", \"c\": \"","_debug_options_count":4},{"id":103811,"question":"La puissance électrique se mesure en :","option_a":"Joules","option_b":"Watts","option_c":"Newtons","option_d":"Volts","option_e":"","option_f":"","bonne_reponse":"b","explication":"La puissance électrique s'exprime en watts (W), où 1 W = 1 J\/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\": \"Joules\", \"b\": \"Watts\", \"c\": \"Newtons\", \"d\": \"Volts\"}}","_debug_options_count":4},{"id":103812,"question":"L'indice de réfraction d'un milieu dépend de la vitesse de la lumière dans ce milieu.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'indice de réfraction n = c\/v, où c est la vitesse de la lumière dans le vide et v sa vitesse dans le milieu.","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":103813,"question":"Quelle est l'unité de la constante de Planck (h) ?","option_a":"Joule (J)","option_b":"Joule-seconde (J·s)","option_c":"Newton (N)","option_d":"Watt (W)","option_e":"","option_f":"","bonne_reponse":"b","explication":"La constante de Planck s'exprime en joule-seconde (J·s) et vaut environ 6,626 × 10⁻³⁴ J·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\": \"Joule (J)\", \"b\": \"Joule-seconde (J·s)\", \"c\": \"Newton (N)\", \"d\": ","_debug_options_count":4},{"id":103814,"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 est la même partout, mais la tension se répartit entre les dipôles.","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":103815,"question":"Quelle est la relation entre la période (T) et la fréquence (f) d'un signal périodique ?","option_a":"T = f","option_b":"T = 1\/f","option_c":"T = f²","option_d":"T = 2πf","option_e":"","option_f":"","bonne_reponse":"b","explication":"La période T est l'inverse de la fréquence : T = 1\/f (où f est en hertz, Hz).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"T = f\", \"b\": \"T = 1\/f\", \"c\": \"T = f²\", \"d\": \"T = 2πf\"}}","_debug_options_count":4},{"id":103816,"question":"Un miroir convexe donne toujours une image :","option_a":"Réelle et droite","option_b":"Réelle et inversée","option_c":"Virtuelle et droite","option_d":"Virtuelle et inversée","option_e":"","option_f":"","bonne_reponse":"c","explication":"Un miroir convexe produit une image virtuelle, droite et plus petite que 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 inversée\", \"c\": \"Virtuelle ","_debug_options_count":4}]