Quiz — Serie RLC Forcées Corrigée N1.pdf

Question 1 sur 10 20:00

[{"id":4826,"question":"Dans un circuit RLC forcé, la tension aux bornes de la résistance est en phase avec :","option_a":"La tension aux bornes de la bobine","option_b":"Le courant dans le circuit","option_c":"La tension aux bornes du condensateur","option_d":"La tension de la source","option_e":"","option_f":"","bonne_reponse":"b","explication":"La tension aux bornes d'une résistance est toujours en phase avec le courant qui la traverse, d'après la loi d'Ohm en régime sinusoïdal.","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 tension aux bornes de la bobine\", \"b\": \"Le courant dans le cir","_debug_options_count":4},{"id":4827,"question":"L'impédance d'un circuit RLC série est minimale à la résonance lorsque :","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"À la résonance, l'impédance est minimale car les effets de la bobine et du condensateur s'annulent (Lω = 1\/(Cω)).","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":4828,"question":"La pulsation de résonance ω₀ d'un circuit RLC est donnée par :","option_a":"ω₀ = R\/L","option_b":"ω₀ = 1\/√(LC)","option_c":"ω₀ = L\/C","option_d":"ω₀ = √(LC)","option_e":"","option_f":"","bonne_reponse":"b","explication":"La formule de la pulsation de résonance est ω₀ = 1\/√(LC), où L est l'inductance 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\": \"b\", \"options\": {\"a\": \"ω₀ = R\/L\", \"b\": \"ω₀ = 1\/√(LC)\", \"c\": \"ω₀ = L\/C\", \"d\": ","_debug_options_count":4},{"id":4829,"question":"Dans un circuit RLC forcé, le déphasage φ entre la tension et le courant est donné par :","option_a":"tan(φ) = (Lω - 1\/(Cω))\/R","option_b":"tan(φ) = R\/(Lω - 1\/(Cω))","option_c":"tan(φ) = (Lω + 1\/(Cω))\/R","option_d":"tan(φ) = R\/(Lω + 1\/(Cω))","option_e":"","option_f":"","bonne_reponse":"a","explication":"Le déphasage φ entre la tension et le courant est donné par tan(φ) = (Lω - 1\/(Cω))\/R, où ω est la pulsation de la source.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"tan(φ) = (Lω - 1\/(Cω))\/R\", \"b\": \"tan(φ) = R\/(Lω - 1\/(Cω))\",","_debug_options_count":4},{"id":4830,"question":"Le facteur de qualité Q d'un circuit RLC est défini par :","option_a":"Q = ω₀L\/R","option_b":"Q = R\/(ω₀L)","option_c":"Q = ω₀RC","option_d":"Q = 1\/(ω₀RC)","option_e":"","option_f":"","bonne_reponse":"a","explication":"Le facteur de qualité Q est défini par Q = ω₀L\/R, où ω₀ est la pulsation de résonance et R la résistance.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Q = ω₀L\/R\", \"b\": \"Q = R\/(ω₀L)\", \"c\": \"Q = ω₀RC\", \"d\": \"Q","_debug_options_count":4},{"id":4831,"question":"À la résonance, le courant dans un circuit RLC série est :","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"À la résonance, l'impédance est minimale, donc le courant est maximal pour une tension donnée.","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":4832,"question":"L'impédance d'un circuit RLC série est toujours supérieure à la résistance R.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"L'impédance Z = √(R² + (Lω - 1\/(Cω))²) est toujours supérieure ou égale à R, avec égalité uniquement à la résonance.","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":4833,"question":"La puissance moyenne dissipée dans un circuit RLC forcé est donnée par :","option_a":"P = RI²","option_b":"P = RU²","option_c":"P = ZI²","option_d":"P = LI²","option_e":"","option_f":"","bonne_reponse":"a","explication":"La puissance moyenne dissipée dans un circuit RLC est P = RI², où I est l'amplitude du courant et R la résistance.","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 = RI²\", \"b\": \"P = RU²\", \"c\": \"P = ZI²\", \"d\": \"P = LI²\"}}","_debug_options_count":4},{"id":4834,"question":"Si on augmente la fréquence de la source dans un circuit RLC série, l'impédance :","option_a":"Diminue toujours","option_b":"Augmente toujours","option_c":"Passe par un minimum","option_d":"Passe par un maximum","option_e":"","option_f":"","bonne_reponse":"c","explication":"L'impédance Z = √(R² + (Lω - 1\/(Cω))²) passe par un minimum à la résonance (ω₀ = 1\/√(LC)).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"Diminue toujours\", \"b\": \"Augmente toujours\", \"c\": \"Passe par un m","_debug_options_count":4},{"id":4835,"question":"Le déphasage φ entre la tension et le courant dans un circuit RLC forcé est toujours positif.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Le déphasage φ peut être positif (circuit inductif) ou négatif (circuit capacitif), selon la valeur de Lω et 1\/(Cω).","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}]