Quiz — 66f44017b2500_Enoncé-Série N°4 Le dipôle RC.pdf

Question 1 sur 10 20:00

[{"id":119660,"question":"Dans un circuit RC série, la constante de temps τ est égale à :","option_a":"τ = L\/R","option_b":"τ = R·C","option_c":"τ = C\/U","option_d":"τ = U·R","option_e":"","option_f":"","bonne_reponse":"b","explication":"La constante de temps τ d'un circuit RC est définie par τ = R·C, où R est la résistance et C la capacité du condensateur.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"τ = L\/R\", \"b\": \"τ = R·C\", \"c\": \"τ = C\/U\", \"d\": \"τ = U·R\"}}","_debug_options_count":4},{"id":119661,"question":"Lors de la charge d'un condensateur dans un circuit RC, la tension à ses bornes :","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Vrai. La tension aux bornes du condensateur augmente progressivement selon une loi exponentielle jusqu'à atteindre 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},{"id":119662,"question":"La capacité C d'un condensateur s'exprime en :","option_a":"Volts (V)","option_b":"Farads (F)","option_c":"Ohms (Ω)","option_d":"Watts (W)","option_e":"","option_f":"","bonne_reponse":"b","explication":"La capacité C se mesure en Farads (F), unité du système international.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Volts (V)\", \"b\": \"Farads (F)\", \"c\": \"Ohms (Ω)\", \"d\": \"Watts (W)\"","_debug_options_count":4},{"id":119663,"question":"L'énergie stockée dans un condensateur de capacité C = 10 µF chargé sous une tension U = 12 V est :","option_a":"E = 720 µJ","option_b":"E = 1440 µJ","option_c":"E = 360 µJ","option_d":"E = 120 µJ","option_e":"","option_f":"","bonne_reponse":"a","explication":"En appliquant E = ½·C·U² = 0.5 × 10×10⁻⁶ × 12² = 720×10⁻⁶ J = 720 µJ.","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 = 720 µJ\", \"b\": \"E = 1440 µJ\", \"c\": \"E = 360 µJ\", \"d\": \"E = ","_debug_options_count":4},{"id":119664,"question":"La décharge d'un condensateur dans un circuit RC est un phénomène :","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Vrai. La décharge est un phénomène exponentiel où la tension aux bornes du condensateur décroît progressivement.","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":119665,"question":"La relation entre la tension U aux bornes d'un condensateur et la charge q est :","option_a":"U = q\/C","option_b":"U = C\/q","option_c":"U = q·R","option_d":"U = R\/q","option_e":"","option_f":"","bonne_reponse":"a","explication":"La relation fondamentale est U = q\/C, où q est la charge et C la capacité.","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 = q\/C\", \"b\": \"U = C\/q\", \"c\": \"U = q·R\", \"d\": \"U = R\/q\"}}","_debug_options_count":4},{"id":119666,"question":"Un circuit RC avec R = 1 kΩ et C = 100 µF a une constante de temps τ égale à :","option_a":"τ = 0.1 s","option_b":"τ = 1 s","option_c":"τ = 10 s","option_d":"τ = 100 ms","option_e":"","option_f":"","bonne_reponse":"a","explication":"τ = R·C = 1000 × 100×10⁻⁶ = 0.1 s.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"τ = 0.1 s\", \"b\": \"τ = 1 s\", \"c\": \"τ = 10 s\", \"d\": \"τ = 100 ms","_debug_options_count":4},{"id":119667,"question":"Lors de la charge d'un condensateur, l'intensité du courant :","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Vrai. L'intensité du courant diminue exponentiellement jusqu'à s'annuler lorsque le condensateur est chargé.","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":119668,"question":"La capacité équivalente de deux condensateurs en série de capacités C₁ et C₂ est :","option_a":"C_eq = C₁ + C₂","option_b":"C_eq = (C₁·C₂)\/(C₁ + C₂)","option_c":"C_eq = C₁·C₂","option_d":"C_eq = 1\/(C₁ + C₂)","option_e":"","option_f":"","bonne_reponse":"b","explication":"Pour des condensateurs en série, la capacité équivalente est donnée par 1\/C_eq = 1\/C₁ + 1\/C₂, soit C_eq = (C₁·C₂)\/(C₁ + C₂).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"C_eq = C₁ + C₂\", \"b\": \"C_eq = (C₁·C₂)\/(C₁ + C₂)\", \"c","_debug_options_count":4},{"id":119669,"question":"Dans un circuit RC, la tension aux bornes de la résistance :","option_a":"Décroît exponentiellement","option_b":"Reste constante","option_c":"Augmente linéairement","option_d":"Décroît linéairement","option_e":"","option_f":"","bonne_reponse":"a","explication":"La tension aux bornes de la résistance décroît exponentiellement lors de la charge du condensateur, car U_R = U_générateur - U_condensateur.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Décroît exponentiellement\", \"b\": \"Reste constante\", \"c\": \"Augme","_debug_options_count":4}]