Quiz — 6374e1cc2e72c_Série 2-le dipole RL- corrigé.pdf

Question 1 sur 10 20:00

[{"id":8305,"question":"Quelle est l'unité de l'inductance L dans le système international ?","option_a":"Henry (H)","option_b":"Farad (F)","option_c":"Ohm (Ω)","option_d":"Tesla (T)","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'inductance se mesure en Henry (H), en hommage à Joseph Henry, physicien américain.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Henry (H)\", \"b\": \"Farad (F)\", \"c\": \"Ohm (Ω)\", \"d\": \"Tesla (T)\"}}","_debug_options_count":4},{"id":8306,"question":"Dans un circuit RL en régime permanent, la tension aux bornes de la bobine est égale à :","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"En régime permanent, le courant est constant, donc dI\/dt = 0, ce qui implique U_L = 0.","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":8307,"question":"La constante de temps τ d'un circuit RL est donnée par la formule :","option_a":"τ = R\/L","option_b":"τ = L\/R","option_c":"τ = R*L","option_d":"τ = 1\/(R*L)","option_e":"","option_f":"","bonne_reponse":"b","explication":"La constante de temps τ = L\/R détermine la rapidité de l'établissement du courant dans le circuit.","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 = R\/L\", \"b\": \"τ = L\/R\", \"c\": \"τ = R*L\", \"d\": \"τ = 1\/(R*L)\"}","_debug_options_count":4},{"id":8308,"question":"L'énergie emmagasinée dans une bobine est donnée par la formule :","option_a":"E = 1\/2 * L * I²","option_b":"E = L * I","option_c":"E = R * I²","option_d":"E = C * U²","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'énergie stockée dans une bobine est E = 1\/2 * L * I², où L est l'inductance et I le 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\": \"E = 1\/2 * L * I²\", \"b\": \"E = L * I\", \"c\": \"E = R * I²\", \"d\": \"E","_debug_options_count":4},{"id":8309,"question":"Dans un circuit RL série, la tension totale aux bornes du dipôle est égale à :","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"La tension totale est la somme des tensions aux bornes de la résistance et de la bobine : U = U_R + U_L.","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":8310,"question":"Quelle est la valeur de la tension aux bornes de la résistance R si le courant I est constant ?","option_a":"U_R = 0","option_b":"U_R = R * I","option_c":"U_R = L * I","option_d":"U_R = 1\/2 * R * I²","option_e":"","option_f":"","bonne_reponse":"b","explication":"La tension aux bornes d'une résistance est donnée par la loi d'Ohm : U_R = R * I.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"U_R = 0\", \"b\": \"U_R = R * I\", \"c\": \"U_R = L * I\", \"d\": \"U_R = 1\/2","_debug_options_count":4},{"id":8311,"question":"Le régime transitoire d'un circuit RL correspond à la période où :","option_a":"Le courant est constant","option_b":"Le courant varie avec le temps","option_c":"La tension est nulle","option_d":"L'énergie est maximale","option_e":"","option_f":"","bonne_reponse":"b","explication":"Le régime transitoire est la phase où le courant varie avec le temps, avant d'atteindre sa valeur maximale en régime permanent.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Le courant est constant\", \"b\": \"Le courant varie avec le temps\", ","_debug_options_count":4},{"id":8312,"question":"La dérivée du courant dI\/dt dans un circuit RL est maximale :","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La dérivée dI\/dt est maximale au début du régime transitoire, lorsque la tension aux bornes de la bobine est maximale.","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":8313,"question":"Quelle est l'expression de la tension aux bornes de la bobine en fonction du courant I(t) ?","option_a":"U_L = R * I(t)","option_b":"U_L = L * dI\/dt","option_c":"U_L = 1\/2 * L * I(t)²","option_d":"U_L = U_total - R * I(t)","option_e":"","option_f":"","bonne_reponse":"b","explication":"La tension aux bornes de la bobine est donnée par U_L = L * dI\/dt, où L est l'inductance et dI\/dt la dérivée du courant.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"U_L = R * I(t)\", \"b\": \"U_L = L * dI\/dt\", \"c\": \"U_L = 1\/2 * L * I(","_debug_options_count":4},{"id":8314,"question":"L'énergie emmagasinée dans une bobine dépend :","option_a":"Uniquement de la résistance R","option_b":"Uniquement de l'inductance L","option_c":"De l'inductance L et du courant I","option_d":"De la tension totale U","option_e":"","option_f":"","bonne_reponse":"c","explication":"L'énergie emmagasinée dans une bobine dépend de son inductance L et du courant I qui la traverse : E = 1\/2 * L * I².","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"Uniquement de la résistance R\", \"b\": \"Uniquement de l'inductance","_debug_options_count":4}]