Quiz — Magazine Enonce le condensateur.pdf

Question 1 sur 10 20:00

[{"id":135208,"question":"Quel est le symbole normalisé d'un condensateur dans un circuit électrique ?","option_a":"A. Une résistance","option_b":"B. Deux barres parallèles","option_c":"C. Un cercle avec un trait","option_d":"D. Une bobine","option_e":"","option_f":"","bonne_reponse":"b","explication":"Le symbole normalisé d'un condensateur est représenté par deux barres parallèles, symbolisant les deux armatures.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"A. Une résistance\", \"b\": \"B. Deux barres parallèles\", \"c\": \"C. ","_debug_options_count":4},{"id":135209,"question":"La capacité C d'un condensateur dépend de sa géométrie.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La capacité dépend de la surface des armatures (S), de la distance entre elles (d) et de la permittivité du matériau (ε).","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":135210,"question":"Quelle est l'unité de la capacité électrique ?","option_a":"A. Le volt (V)","option_b":"B. L'ampère (A)","option_c":"C. Le farad (F)","option_d":"D. Le watt (W)","option_e":"","option_f":"","bonne_reponse":"c","explication":"L'unité de la capacité est le farad (F), en hommage à Michael Faraday.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"A. Le volt (V)\", \"b\": \"B. L'ampère (A)\", \"c\": \"C. Le farad (F)\",","_debug_options_count":4},{"id":135211,"question":"Lors de la charge d'un condensateur, le courant diminue exponentiellement avec le temps.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Le courant de charge suit une loi exponentielle décroissante : i(t) = I₀ * e^(-t\/τ).","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":135212,"question":"La constante de temps τ d'un circuit RC est égale à :","option_a":"A. R + C","option_b":"B. R * C","option_c":"C. R \/ C","option_d":"D. C \/ R","option_e":"","option_f":"","bonne_reponse":"b","explication":"La constante de temps 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\": \"A. R + C\", \"b\": \"B. R * C\", \"c\": \"C. R \/ C\", \"d\": \"D. C \/ R\"}}","_debug_options_count":4},{"id":135213,"question":"Un condensateur idéal ne dissipe pas d'énergie sous forme de chaleur.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Un condensateur idéal est un composant réactif qui ne dissipe pas d'énergie (pas de perte par effet Joule).","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":135214,"question":"Quelle est la relation entre la charge Q, la capacité C et la tension U aux bornes d'un condensateur ?","option_a":"A. Q = C \/ U","option_b":"B. Q = C * U","option_c":"C. U = C * Q","option_d":"D. Q = U \/ C","option_e":"","option_f":"","bonne_reponse":"b","explication":"La relation est Q = C * U, où Q est la charge stockée, C la capacité et U la tension.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"A. Q = C \/ U\", \"b\": \"B. Q = C * U\", \"c\": \"C. U = C * Q\", \"d\": \"D.","_debug_options_count":4},{"id":135215,"question":"L'énergie stockée dans un condensateur est proportionnelle à :","option_a":"A. La tension U seulement","option_b":"B. La capacité C seulement","option_c":"C. Le carré de la tension U²","option_d":"D. Le carré de la capacité C²","option_e":"","option_f":"","bonne_reponse":"c","explication":"L'énergie stockée est E = ½ * C * U², donc proportionnelle au carré de la tension.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"A. La tension U seulement\", \"b\": \"B. La capacité C seulement\", \"","_debug_options_count":4},{"id":135216,"question":"Un condensateur en série avec une résistance forme un circuit RC.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Un circuit RC est composé d'une résistance et d'un condensateur en série ou en parallèle.","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":135217,"question":"Quel est l'effet d'un condensateur dans un circuit de filtrage ?","option_a":"A. Augmenter la tension","option_b":"B. Bloquer les hautes fréquences","option_c":"C. Stocker l'énergie thermique","option_d":"D. Convertir le courant continu en alternatif","option_e":"","option_f":"","bonne_reponse":"b","explication":"Un condensateur en filtrage permet de bloquer les hautes fréquences (effet de court-circuit pour les AC) et de laisser passer les basses fréquences.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"A. Augmenter la tension\", \"b\": \"B. Bloquer les hautes fréquences","_debug_options_count":4}]