电阻调节和电容调节不足以使电桥平衡怎么办
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\u5e0c\u671b\u80fd\u7ed9\u4f60\u63d0\u4f9b\u5e2e\u52a9~~
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(a-x)/1\uff1dx/2+(x-y)/5 ........(1)
(a-y)/3\uff1dy/4+(y-x)/5 ........(2)
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x=102/155*a
y=92/155*a
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I1=(a-x)/1=53/155*a
I2=(a-y)/3=21/155*a
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I=I1+I2=74/155*a
\u53ef\u5f97\u603b\u7684\u7b49\u6548\u7535\u963b
R=a/I=155/74=2.0946(\u03a9)
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应该改变电容和电阻的连接方式，串联的改成并联，并联的改成串联。一般都可以平衡了。如果还不能平衡，那么可能就是电容的损耗太小或太大，电感的话Q 值太小。或者电桥不够好。绛旓細濡傚紑灏旀枃鐢垫ˉ锛屽畠鍦璋冭妭R1銆丷2銆丷3銆丷4鍜屾爣鍑鐢甸樆Rs锛屼娇鐢垫祦璁℃棤鍋忚浆鏃讹紝閫氳繃骞宠 鏉′欢锛圧1R2=R3R4鍜孯x=R1R2Rs锛夋潵纭畾鏈煡鐢甸樆Rx銆傛荤殑鏉ヨ锛岀數妗ョ伒鏁忓害鐨勬祴閲忔槸閫氳繃璋冩暣鐢垫ˉ鍚勯儴鍒嗙數闃伙紝纭繚鍦ㄥ钩琛＄姸鎬佷笅鐨勫井灏忓彉鍖栬兘琚噯纭崟鎹夈備笉鍚岀殑鐢垫ˉ璁捐閫傜敤浜庝笉鍚岀殑鐢甸樆鑼冨洿锛屼互淇濊瘉娴嬮噺鐨勭簿纭у拰鏁堢巼銆
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