Quiz — courant continu.pdf

Question 1 sur 10 20:00

[{"id":38520,"question":"Quel appareil mesure l'intensité du courant électrique ?","option_a":"Voltmètre","option_b":"Ampèremètre","option_c":"Ohmmètre","option_d":"Générateur","option_e":"","option_f":"","bonne_reponse":"b","explication":"L'ampèremètre est l'appareil de mesure de l'intensité du courant électrique, exprimée en ampères (A).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Voltmètre\", \"b\": \"Ampèremètre\", \"c\": \"Ohmmètre\", \"d\": \"Géné","_debug_options_count":4},{"id":38521,"question":"La tension aux bornes d'un conducteur ohmique est proportionnelle à l'intensité du courant qui le traverse.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"C'est la loi d'Ohm : U = R × I, où U est la tension, R la résistance et I l'intensité.","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":38522,"question":"Quelle est l'unité de la résistance électrique ?","option_a":"Ampère (A)","option_b":"Volt (V)","option_c":"Ohm (Ω)","option_d":"Watt (W)","option_e":"","option_f":"","bonne_reponse":"c","explication":"L'unité de la résistance électrique est l'ohm (Ω), d'après la loi d'Ohm.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"Ampère (A)\", \"b\": \"Volt (V)\", \"c\": \"Ohm (Ω)\", \"d\": \"Watt (W)\"}}","_debug_options_count":4},{"id":38523,"question":"Dans un circuit en série, si on ajoute une résistance, l'intensité totale du courant :","option_a":"Augmente","option_b":"Diminue","option_c":"Reste la même","option_d":"Devient nulle","option_e":"","option_f":"","bonne_reponse":"b","explication":"En série, la résistance totale augmente, donc l'intensité totale diminue (loi d'Ohm).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Augmente\", \"b\": \"Diminue\", \"c\": \"Reste la même\", \"d\": \"Devient n","_debug_options_count":4},{"id":38524,"question":"La puissance électrique se calcule avec la formule :","option_a":"P = U × I","option_b":"P = R × I","option_c":"P = U² \/ R","option_d":"P = R \/ I","option_e":"","option_f":"","bonne_reponse":"a","explication":"La puissance électrique P s'exprime en watts (W) et se calcule par P = U × I.","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 = U × I\", \"b\": \"P = R × I\", \"c\": \"P = U² \/ R\", \"d\": \"P = R \/","_debug_options_count":4},{"id":38525,"question":"Dans un circuit en parallèle, la tension aux bornes de chaque dipôle est la même.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"En parallèle, la tension est identique aux bornes de chaque dipôle, contrairement à l'intensité.","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":38526,"question":"Quelle est la relation entre la puissance, la tension et l'intensité ?","option_a":"P = U × I","option_b":"P = U \/ I","option_c":"P = I \/ U","option_d":"P = U² × I","option_e":"","option_f":"","bonne_reponse":"a","explication":"La puissance P est donnée par P = U × I, où U est la tension et I l'intensité.","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 = U × I\", \"b\": \"P = U \/ I\", \"c\": \"P = I \/ U\", \"d\": \"P = U² ×","_debug_options_count":4},{"id":38527,"question":"Un générateur de tension idéale a une résistance interne :","option_a":"Nulle","option_b":"Infinie","option_c":"Égale à 1 Ω","option_d":"Variable","option_e":"","option_f":"","bonne_reponse":"a","explication":"Un générateur idéal a une résistance interne nulle, ce qui permet de fournir une tension constante.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Nulle\", \"b\": \"Infinie\", \"c\": \"Égale à 1 Ω\", \"d\": \"Variable\"}}","_debug_options_count":4},{"id":38528,"question":"L'énergie électrique consommée par un appareil se mesure en :","option_a":"Joules (J)","option_b":"Watts (W)","option_c":"Ampères (A)","option_d":"Volts (V)","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'énergie électrique s'exprime en joules (J) ou en wattheures (Wh) pour les applications pratiques.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Joules (J)\", \"b\": \"Watts (W)\", \"c\": \"Ampères (A)\", \"d\": \"Volts (","_debug_options_count":4},{"id":38529,"question":"Dans un circuit en série, la résistance totale est égale à la somme des résistances individuelles.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"En série, la résistance totale R_total = R1 + R2 + ... + Rn, selon la loi des mailles.","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}]