测量如图指示灯的阻值是不是将万用表打到电阻档，笔头连接灯接线端就可以了?为什么测量会显示无穷大？ 怎么用万用表测量电器电路板上面的电阻是否坏了？
\u600e\u4e48\u7528\u4e07\u7528\u8868\u6d4b\u91cf\u7535\u5668\u7535\u8def\u677f\u4e0a\u9762\u7684\u7535\u963b\u662f\u5426\u574f\u4e86\u9996\u5148\u662f\u76f4\u63a5\u6d4b\u91cf\u7535\u963b\uff0c\u5148\u8bf4\u4f20\u7edf\u7684\u4e07\u7528\u8868\u5427\u3002\u628a\u6307\u9488\u6253\u5230\u5982\u56fe\u6240\u793a\u7684\u6863\u4f4d\uff08\u6b27\u59c6\u6863\u03a9\uff09\u8fd9\u662f\u6d4b\u91cf\u7535\u963b\u7528\u7684\u6863\u4f4d\u3002
2
\u7535\u6d41\u548c\u7535\u538b\u7684\u8bfb\u6570\u7684\u8d77\u59cb\u4f4d\u7f6e0\u5728\u5de6\u8fb9\uff0c\u800c\u7535\u963b\u7684\u8d77\u59cb\u4f4d\u7f6e0\u5728\u53f3\u8fb9\u627e\u5230\u7535\u963b\u7684\u8bfb\u6570\u8868\u76d8\u7ebf\uff0c\u5f85\u4f1a\u513f\u8bfb\u6570\u5c31\u662f\u4ece\u8fd9\u91cc\u8bfb\u3002
3
\u5c06\u4e07\u7528\u8868\u4e24\u4e2a\u7b14\u5934\u5bf9\u63a5\u7136\u540e\u770b\u6307\u9488\u662f\u5426\u6307\u54110\u4f4d\u7f6e\u3002\u5982\u679c\u4e0d\u662f\u4e07\u7528\u8868\u6709\u4e2a\u673a\u68b0\u8c03\u8282\u7684\u5730\u65b9\uff0c\u8f6c\u52a8\u5b83\u8ba9\u5b83\u5f52\u96f6\uff08\u5982\u679c\u4e0d\u80fd\u8c030\u8bf4\u660e\u7535\u6c60\u6ca1\u7535\u4e86\uff09
4
\u5c06\u4e24\u4e2a\u7b14\u5934\u5206\u522b\u7f6e\u4e8e\u7535\u963b\u4e24\u7aef\uff0c\u5373\u53ef\u6d4b\u91cf\u8bfb\u6570\u3002\u8fd9\u65f6\u8bfb\u51fa\u7684\u5c31\u662f\u7535\u963b\u963b\u503c\u3002\u8fd9\u79cd\u65b9\u6cd5\u4e0d\u80fd\u6d4b\u91cf\u7535\u7f18\u7535\u963b\u3002\u7535\u963b\u503c=\u6863\u4f4d\u00d7\u8bfb\u6570 \u6bd4\u5982\u6863\u4f4d\u662f100\u03a9\u8bfb\u6570\u662f30\u90a3\u5c31\u662f3K\u6b27\u59c6\u3002
5
\u6570\u5b57\u5f0f\u7684\u66f4\u7b80\u5355\uff0c\u5c06\u6863\u4f4d\u6253\u5230\u6b27\u59c6\u6863\u4e4b\u95f4\u8bfb\u6570\u5373\u53ef\u3002
END
\u6d4b\u91cf\u7535\u6e90\u7535\u963b
1
\u6d4b\u91cf\u7535\u6e90\u7535\u963b\u9700\u8981\u6709\u8f85\u52a9\u7535\u963b\u5b9e\u73b0\uff0c\u8f85\u52a9\u7535\u963b\u4e5f\u53ef\u4ee5\u662f\u4e00\u4e2a\u767d\u70bd\u706f\u6ce1\uff08led\u7684\u53ef\u4e0d\u884c\uff09\u3002\u9996\u5148\u6309\u7167\u4e0a\u9762\u7684\u65b9\u6cd5\u6d4b\u91cf\u8be5\u7535\u963b\u7684\u963b\u503c\u8bb0\u5f55r1\u3002
2
\u4e07\u7528\u8868\u6253\u5230\u76f4\u6d41\u7535\u538b\u6863\uff0c\u6d4b\u91cf\u7535\u6e90\u7684\u7535\u538b\u8bb0\u5f55\u963b\u503cv1
3
\u5c06\u7535\u6e90\u548c\u7535\u963b\u76f8\u63a5\u6d4b\u91cf\u52a0\u5728\u7535\u963b\u4e0a\u7684\u7535\u538bv2\u3002
4
\u7535\u6e90\u7684\u7535\u963b=r1\u00d7v2\u00f7v1\u3002\u8fd9\u6837\u5c31\u5f97\u5230\u4e86\u7535\u6e90\u963b\u503c\u3002
END
\u89c1\u6d4b\u91cf\u7535\u95f4\u63a5
1
\u4ece\u4e0a\u9762\u7684\u65b9\u6cd5\u53ef\u4ee5\u7c7b\u6bd4\u5982\u4f55\u95f4\u63a5\u5730\u6d4b\u91cf\u7535\u963b\u3002\u5982\u679c\u77e5\u9053\u4e00\u4e2a\u5df2\u77e5\u963b\u503c\u7684\u7535\u963b\uff0c\u7136\u540e\u6309\u7167\u4e32\u8054\u7684\u65b9\u6cd5\uff0c\u6d4b\u91cf\u4e00\u4e2a\u7535\u963b\u7684\u7535\u538b\u518d\u6d4b\u91cf\u53e6\u4e00\u4e2a\u7535\u963b\u7684\u7535\u538b\uff0c\u7528\u4e0a\u9762\u7684\u8ba1\u7b97\u65b9\u6cd5\u5c31\u80fd\u8ba1\u7b97\u51fa\u6765\u3002
2
\u8fd8\u6709\u5c31\u662f\u5c06\u7535\u963b\u63a5\u5728\u7535\u6e90\u4e0a\u5206\u522b\u6d4b\u91cf\u7535\u538b\u548c\u7535\u6d41\u7528\u7535\u538b\u9664\u4ee5\u7535\u6d41\u8ba1\u7b97\u963b\u503c\u3002\u8fd9\u4e9b\u5c31\u4e0d\u4e00\u4e00\u8be6\u8ff0\u4e86\u3002
\u9996\u5148\u662f\u76f4\u63a5\u6d4b\u91cf\u7535\u963b\uff0c\u5148\u8bf4\u4f20\u7edf\u7684\u4e07\u7528\u8868\u5427\u3002\u628a\u6307\u9488\u6253\u5230\u5982\u56fe\u6240\u793a\u7684\u6863\u4f4d\uff08\u6b27\u59c6\u6863\u03a9\uff09\u8fd9\u662f\u6d4b\u91cf\u7535\u963b\u7528\u7684\u6863\u4f4d\u3002
2
\u7535\u6d41\u548c\u7535\u538b\u7684\u8bfb\u6570\u7684\u8d77\u59cb\u4f4d\u7f6e0\u5728\u5de6\u8fb9\uff0c\u800c\u7535\u963b\u7684\u8d77\u59cb\u4f4d\u7f6e0\u5728\u53f3\u8fb9\u627e\u5230\u7535\u963b\u7684\u8bfb\u6570\u8868\u76d8\u7ebf\uff0c\u5f85\u4f1a\u513f\u8bfb\u6570\u5c31\u662f\u4ece\u8fd9\u91cc\u8bfb\u3002
3
\u5c06\u4e07\u7528\u8868\u4e24\u4e2a\u7b14\u5934\u5bf9\u63a5\u7136\u540e\u770b\u6307\u9488\u662f\u5426\u6307\u54110\u4f4d\u7f6e\u3002\u5982\u679c\u4e0d\u662f\u4e07\u7528\u8868\u6709\u4e2a\u673a\u68b0\u8c03\u8282\u7684\u5730\u65b9\uff0c\u8f6c\u52a8\u5b83\u8ba9\u5b83\u5f52\u96f6\uff08\u5982\u679c\u4e0d\u80fd\u8c030\u8bf4\u660e\u7535\u6c60\u6ca1\u7535\u4e86\uff09
4
\u5c06\u4e24\u4e2a\u7b14\u5934\u5206\u522b\u7f6e\u4e8e\u7535\u963b\u4e24\u7aef\uff0c\u5373\u53ef\u6d4b\u91cf\u8bfb\u6570\u3002\u8fd9\u65f6\u8bfb\u51fa\u7684\u5c31\u662f\u7535\u963b\u963b\u503c\u3002\u8fd9\u79cd\u65b9\u6cd5\u4e0d\u80fd\u6d4b\u91cf\u7535\u7f18\u7535\u963b\u3002\u7535\u963b\u503c=\u6863\u4f4d\u00d7\u8bfb\u6570 \u6bd4\u5982\u6863\u4f4d\u662f100\u03a9\u8bfb\u6570\u662f30\u90a3\u5c31\u662f3K\u6b27\u59c6\u3002
5
\u6570\u5b57\u5f0f\u7684\u66f4\u7b80\u5355\uff0c\u5c06\u6863\u4f4d\u6253\u5230\u6b27\u59c6\u6863\u4e4b\u95f4\u8bfb\u6570\u5373\u53ef\u3002
END
\u6d4b\u91cf\u7535\u6e90\u7535\u963b
1
\u6d4b\u91cf\u7535\u6e90\u7535\u963b\u9700\u8981\u6709\u8f85\u52a9\u7535\u963b\u5b9e\u73b0\uff0c\u8f85\u52a9\u7535\u963b\u4e5f\u53ef\u4ee5\u662f\u4e00\u4e2a\u767d\u70bd\u706f\u6ce1\uff08led\u7684\u53ef\u4e0d\u884c\uff09\u3002\u9996\u5148\u6309\u7167\u4e0a\u9762\u7684\u65b9\u6cd5\u6d4b\u91cf\u8be5\u7535\u963b\u7684\u963b\u503c\u8bb0\u5f55r1\u3002
2
\u4e07\u7528\u8868\u6253\u5230\u76f4\u6d41\u7535\u538b\u6863\uff0c\u6d4b\u91cf\u7535\u6e90\u7684\u7535\u538b\u8bb0\u5f55\u963b\u503cv1
3
\u5c06\u7535\u6e90\u548c\u7535\u963b\u76f8\u63a5\u6d4b\u91cf\u52a0\u5728\u7535\u963b\u4e0a\u7684\u7535\u538bv2\u3002
4
\u7535\u6e90\u7684\u7535\u963b=r1\u00d7v2\u00f7v1\u3002\u8fd9\u6837\u5c31\u5f97\u5230\u4e86\u7535\u6e90\u963b\u503c\u3002
END
\u89c1\u6d4b\u91cf\u7535\u95f4\u63a5
1
\u4ece\u4e0a\u9762\u7684\u65b9\u6cd5\u53ef\u4ee5\u7c7b\u6bd4\u5982\u4f55\u95f4\u63a5\u5730\u6d4b\u91cf\u7535\u963b\u3002\u5982\u679c\u77e5\u9053\u4e00\u4e2a\u5df2\u77e5\u963b\u503c\u7684\u7535\u963b\uff0c\u7136\u540e\u6309\u7167\u4e32\u8054\u7684\u65b9\u6cd5\uff0c\u6d4b\u91cf\u4e00\u4e2a\u7535\u963b\u7684\u7535\u538b\u518d\u6d4b\u91cf\u53e6\u4e00\u4e2a\u7535\u963b\u7684\u7535\u538b\uff0c\u7528\u4e0a\u9762\u7684\u8ba1\u7b97\u65b9\u6cd5\u5c31\u80fd\u8ba1\u7b97\u51fa\u6765\u3002
2
\u8fd8\u6709\u5c31\u662f\u5c06\u7535\u963b\u63a5\u5728\u7535\u6e90\u4e0a\u5206\u522b\u6d4b\u91cf\u7535\u538b\u548c\u7535\u6d41\u7528\u7535\u538b\u9664\u4ee5\u7535\u6d41\u8ba1\u7b97\u963b\u503c\u3002\u8fd9\u4e9b\u5c31\u4e0d\u4e00\u4e00\u8be6\u8ff0\u4e86\u3002
测量指示等的阻值就是你所描述的方式，将万用表打到测电阻阻抗的挡上，将测量笔头分别连接到灯的接线端子上。
测量值显示是无限大的可能性有两种：
1. 指示灯已经烧断了；
2. 万用表故障。
你打到电阻的10K档试试。
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绛旓細鎺200娆х數闃汇備竴鑸彂鍏変簩鏋佺鐨勭數娴佷负5锛30mA銆1銆佹帴200娆х數闃汇傜數娴1A锛屼笉鑳70鈥200娆у閫夋嫨銆傜敤鏉ュ仛鎸囩ず鐏殑鏅氬彂鍏夛紝浜屾瀬绠′覆鎺43~47K锛2W~3W鐨勭數闃銆傜數娴佷竴鑸5mA(楂樹寒鐨勫彂鍏変簩鏋佺鎺ョ殑鐢甸樆澶х偣110~150K锛1/2W銆傜數娴佷竴鑸2mA)锛岀伅瑕佸弽鍚戝苟鑱斾竴涓彂鍏変簩鏋佺IN4007鎴朓N4007銆2銆佸綋鐒惰繖鏄悊鎯冲硷紝绠...
绛旓細鏃舵斂淇℃伅涓嶅疄 鍨冨溇骞垮憡 浣庤川鐏屾按 鎴戜滑浼氶氳繃娑堟伅銆侀偖绠辩瓑鏂瑰紡灏藉揩灏嗕妇鎶ョ粨鏋滈氱煡鎮ㄣ 璇存槑 0/200 鎻愪氦 鍙栨秷棰嗗彇濂栧姳 鎴戠殑璐㈠瘜鍊 -- 鍘荤櫥褰 鎴戠殑鐜伴噾 -- 鍘荤櫥褰 鍋氫换鍔″紑瀹濈 绱瀹屾垚 0 涓换鍔 10浠诲姟 鐣ョ暐鐣ョ暐鈥 50浠诲姟 鐣ョ暐鐣ョ暐鈥 100浠诲姟 鐣ョ暐鐣ョ暐鈥 200浠诲姟 鐣ョ暐鐣ョ暐鈥 浠诲姟鍒楄〃鍔犺浇涓...
绛旓細濡傛灉闀挎湡涓嶄娇鐢 ,杩樺簲灏嗕竾鐢ㄨ〃鍐呴儴鐨勭數姹犲彇鍑烘潵,浠ュ厤鐢垫睜鑵愯殌琛ㄥ唴鍏跺畠鍣ㄤ欢銆 娆у鎸＄殑浣跨敤 涓銆侀夋嫨鍚堥傜殑鍊嶇巼銆傚湪娆у琛娴嬮噺鐢甸樆鏃,搴旈夐傚綋鐨勫嶇巼,浣挎寚閽鎸囩ず鍦ㄤ腑鍊奸檮杩戙傛渶濂戒笉浣跨敤鍒诲害宸﹁竟涓夊垎涔嬩竴鐨勯儴鍒,杩欓儴鍒嗗埢搴﹀瘑闆嗗緢宸 浜屻佷娇鐢ㄥ墠瑕佽皟闆躲 涓夈佷笉鑳藉甫鐢垫祴閲忋 鍥涖佽娴嬬數闃讳笉鑳芥湁骞惰仈鏀矾銆 浜...
