Quiz — 6333bd0ed7cb7__Série 2-le condensateur- énoncé.pdf

Question 1 sur 10 20:00

[{"id":73745,"question":"Quelle est l'unité de la capacité d'un condensateur ?","option_a":"Volt (V)","option_b":"Farad (F)","option_c":"Ampère (A)","option_d":"Ohm (Ω)","option_e":"","option_f":"","bonne_reponse":"b","explication":"L'unité de 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\": \"b\", \"options\": {\"a\": \"Volt (V)\", \"b\": \"Farad (F)\", \"c\": \"Ampère (A)\", \"d\": \"Ohm (Ω)\"}","_debug_options_count":4},{"id":73746,"question":"Un condensateur de capacité 10 µF est soumis à une tension de 5 V. Quelle est l'énergie stockée ?","option_a":"250 µJ","option_b":"125 µJ","option_c":"50 µJ","option_d":"25 µJ","option_e":"","option_f":"","bonne_reponse":"b","explication":"E = ½ C U² = 0.5 × 10×10⁻⁶ × 5² = 125 µJ.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"250 µJ\", \"b\": \"125 µJ\", \"c\": \"50 µJ\", \"d\": \"25 µJ\"}}","_debug_options_count":4},{"id":73747,"question":"La charge d'un condensateur est proportionnelle à la tension appliquée.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La charge Q = C × U, donc elle est bien proportionnelle à U.","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":73748,"question":"Dans un circuit RC, que se passe-t-il si on augmente la résistance R ?","option_a":"La constante de temps τ diminue","option_b":"La constante de temps τ augmente","option_c":"La tension aux bornes du condensateur reste inchangée","option_d":"Le condensateur se charge instantanément","option_e":"","option_f":"","bonne_reponse":"b","explication":"τ = R × C, donc si R augmente, τ augmente aussi.","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 constante de temps τ diminue\", \"b\": \"La constante de temps τ","_debug_options_count":4},{"id":73749,"question":"Un condensateur de 220 µF est chargé sous 12 V. Quelle est sa charge en Coulombs ?","option_a":"2.64 mC","option_b":"2640 C","option_c":"264 µC","option_d":"0.264 mC","option_e":"","option_f":"","bonne_reponse":"a","explication":"Q = C × U = 220×10⁻⁶ × 12 = 2.64×10⁻³ C = 2.64 mC.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"2.64 mC\", \"b\": \"2640 C\", \"c\": \"264 µC\", \"d\": \"0.264 mC\"}}","_debug_options_count":4},{"id":73750,"question":"La décharge d'un condensateur dans un circuit RC est toujours linéaire.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"La décharge suit une loi exponentielle : U(t) = U₀ e^(-t\/τ).","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":73751,"question":"Quel est le rôle principal d'un condensateur dans un circuit électrique ?","option_a":"Augmenter la résistance totale","option_b":"Stocker de l'énergie électrique","option_c":"Convertir l'énergie en lumière","option_d":"Générer un courant continu","option_e":"","option_f":"","bonne_reponse":"b","explication":"Son rôle principal est de stocker de l'énergie sous forme de champ électrique.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Augmenter la résistance totale\", \"b\": \"Stocker de l'énergie él","_debug_options_count":4},{"id":73752,"question":"Si un condensateur a une capacité de 470 nF et une tension maximale de 25 V, quelle est sa charge maximale ?","option_a":"11.75 µC","option_b":"11750 C","option_c":"11.75 mC","option_d":"1.175 µC","option_e":"","option_f":"","bonne_reponse":"a","explication":"Q_max = C × U_max = 470×10⁻⁹ × 25 = 11.75×10⁻⁶ C = 11.75 µC.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"11.75 µC\", \"b\": \"11750 C\", \"c\": \"11.75 mC\", \"d\": \"1.175 µC\"}}","_debug_options_count":4},{"id":73753,"question":"La capacité d'un condensateur dépend de la distance entre ses armatures.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La capacité C = ε₀ εᵣ S \/ d, donc elle dépend de la distance d entre les armatures.","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":73754,"question":"Un condensateur de 100 µF est chargé à 9 V puis déconnecté du circuit. Quelle est la tension après 1 seconde si τ = 0.5 s ?","option_a":"3.3 V","option_b":"5.5 V","option_c":"6.7 V","option_d":"9 V","option_e":"","option_f":"","bonne_reponse":"a","explication":"U(t) = U₀ e^(-t\/τ) = 9 e^(-1\/0.5) ≈ 3.3 V.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"3.3 V\", \"b\": \"5.5 V\", \"c\": \"6.7 V\", \"d\": \"9 V\"}}","_debug_options_count":4}]