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\u6807\u51c6\u88c5\u7f6e<\/strong><\/strong><\/p>\n\n\n\n

10 Hz \uff5e 10 kHz\u5fae\u5f31\u78c1\u573a\u6807\u51c6\u88c5\u7f6e<\/strong><\/strong><\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u88c5\u7f6e\u7b80\u4ecb<\/strong><\/strong><\/p>\n\n\n\n

10 Hz\uff5e10 kHz\u5fae\u5f31\u78c1\u573a\u6807\u51c6\u88c5\u7f6e\u662f\u76ee\u524d\u56fd\u5185\u5c11\u6570\u80fd\u591f\u51c6\u786e\u4ea7\u751f0.1 nT \uff5e 1\u03bcT\u8303\u56f4\u4ea4\u53d8\u5fae\u5f31\u78c1\u573a\u7684\u6807\u51c6\u88c5\u7f6e\uff0c\u7528\u4e8e\u68c0\u5b9a\/\u6821\u51c6\u6d4b\u91cf\u7ebf\u5708\u3001\u4ea4\u53d8\u78c1\u5f3a\u8ba1\u3001\u4ea4\u53d8\u78c1\u4f20\u611f\u5668\u7684\u6d4b\u91cf\u7ebf\u5708\u5e38\u6570\u3001\u7075\u654f\u5ea6\u3001\u7ebf\u6027\u5ea6\u3001\u9891\u54cd\u7279\u6027\u3001\u566a\u58f0\u3001\u6f02\u79fb\u7b49\u53c2\u6570\u3002<\/p>\n\n\n\n

\u6280\u672f\u6307\u6807<\/strong><\/strong><\/p>\n\n\n\n

a)\u5de5\u4f5c\u9891\u7387\uff1a10 Hz \uff5e 10 kHz\u3002<\/p>\n\n\n\n

b)\u590d\u73b0\u78c1\u573a\uff1a0.1 nT \uff5e 1 \u03bcT\uff0cU<\/em>=1.2\u00d710-2<\/sup>B<\/em>+20 pT\uff08k<\/em>=2\uff09\u3002<\/p>\n\n\n\n

10 Hz \uff5e 10 kHz\u5f31\u78c1\u573a\u6807\u51c6\u88c5\u7f6e<\/strong><\/strong><\/p>\n\n\n\n

\u88c5\u7f6e\u7b80\u4ecb<\/strong><\/strong><\/p>\n\n\n\n

\u00a0\u00a0\u00a0\u00a010 Hz \uff5e 10 kHz\u5f31\u78c1\u573a\u6807\u51c6\u88c5\u7f6e\u4e3a\u56fd\u9632\u78c1\u5b66\u8ba1\u91cf\u6807\u51c6\u88c5\u7f6e\uff0c\u7528\u4e8e\u68c0\u5b9a\/\u6821\u51c6\u4ea4\u53d8\u78c1\u573a\u7ebf\u5708\u3001\u6d4b\u91cf\u7ebf\u5708\u3001\u4ea4\u53d8\u78c1\u5f3a\u8ba1\u3001\u4ea4\u53d8\u78c1\u4f20\u611f\u5668\u7684\u78c1\u573a\u7ebf\u5708\u5e38\u6570\u3001\u5747\u5300\u533a\u3001\u6d4b\u91cf\u7ebf\u5708\u5e38\u6570\u3001\u7075\u654f\u5ea6\u3001\u7ebf\u6027\u5ea6\u3001\u9891\u54cd\u7279\u6027\u7b49\u53c2\u6570<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u6280\u672f\u6307\u6807<\/strong><\/strong><\/p>\n\n\n\n

a)\u5de5\u4f5c\u9891\u7387\uff1a10 Hz \uff5e 10 kHz\u3002<\/p>\n\n\n\n

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100 kHz \uff5e 30 MHz\u5f31\u78c1\u573a\u6807\u51c6\u88c5\u7f6e<\/strong><\/strong><\/p>\n\n\n\n

\u88c5\u7f6e\u7b80\u4ecb<\/strong><\/strong><\/p>\n\n\n\n

100 kHz \uff5e 30 MHz\u5f31\u78c1\u573a\u6807\u51c6\u88c5\u7f6e\uff0c\u7528\u4e8e\u78c1\u573a\u5929\u7ebf\u3001\u6307\u793a\u5929\u7ebf\u7684\u6821\u51c6\u670d\u52a1\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

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a)\u5de5\u4f5c\u9891\u7387\uff1a100 kHz \uff5e 30 MHz\u3002<\/p>\n\n\n\n

b)\u590d\u73b0\u78c1\u573a\uff1a0.1 nT \uff5e 10 nT\uff08100 kHz \uff5e 30 MHz\uff09\uff0cU<\/em>rel<\/sub>=10%\uff08k<\/em>=2\uff09\u3002<\/p>\n\n\n\n

10 nT \uff5e 10\u03bcT\uff08100 kHz \uff5e 10 MHz\uff09\uff0cU<\/em>rel<\/sub>=5%\uff08k<\/em>=2\uff09\u3002<\/p>\n\n\n\n

40 Hz \uff5e 1 kHz\u4e2d\u78c1\u573a\u6807\u51c6\u88c5\u7f6e<\/strong><\/strong><\/p>\n\n\n\n

\u88c5\u7f6e\u7b80\u4ecb<\/strong><\/strong><\/p>\n\n\n\n

40 Hz \uff5e 1 kHz\u4e2d\u78c1\u573a\u6807\u51c6\u88c5\u7f6e\u662f\u76ee\u524d\u56fd\u5185\u5c11\u6570\u80fd\u591f\u4ea7\u751f\u4ea4\u53d81 kHz\u3001100 mT\u78c1\u573a\u7684\u4ea4\u53d8\u78c1\u573a\u6807\u51c6\u88c5\u7f6e\uff0c\u53ef\u4e3a\u6d4b\u91cf\u7ebf\u5708\u3001\u970d\u5c14\u78c1\u5f3a\u8ba1\u7b49\u4e2d\u5f3a\u78c1\u573a\u8ba1\u91cf\u5668\u5177\u5f00\u5c55\u8ba1\u91cf\u6d4b\u8bd5\u670d\u52a1\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u6280\u672f\u6307\u6807<\/strong><\/strong><\/p>\n\n\n\n

a)\u5de5\u4f5c\u9891\u7387\uff1a40 Hz \uff5e 1 kHz\u3002<\/p>\n\n\n\n

b)\u590d\u73b0\u78c1\u573a\uff1a1 mT \uff5e 1 T\uff0cU<\/em>=1.8\u00d710-2 <\/sup>\uff5e 0.7\u00d710-3<\/sup>\uff08k<\/em>=2\uff09\u3002<\/p>\n\n\n\n

c)\u6d4b\u91cf\u7ebf\u5708\u5e38\u6570\uff1a1 mWb\/T \uff5e 0.01 Wb\/T ,U<\/em>rel<\/sub>=1.1% \uff5e 0.62%\uff08k<\/em>=2\uff09\u3002<\/p>\n\n\n\n

20 \u03bcT \uff5e 100 \u03bcT\u6052\u5b9a\u78c1\u573a\u6807\u51c6\u88c5\u7f6e<\/strong><\/strong><\/p>\n\n\n\n

\u88c5\u7f6e\u7b80\u4ecb<\/strong><\/strong><\/p>\n\n\n\n

20 \u03bcT \uff5e 100 \u03bcT\u6052\u5b9a\u78c1\u573a\u6807\u51c6\u88c5\u7f6e\u7684\u51c6\u786e\u5ea6\u6c34\u5e73\u5728\u56fd\u5185\u5904\u4e8e\u5148\u8fdb\u6c34\u5e73\u3002\u53ef\u7528\u4e8e\u7535\u78c1\u8f90\u5c04\u5b89\u5168\u9632\u62a4\u3001\u77f3\u6cb9\u52d8\u63a2\u3001\u77f3\u6cb9\u94bb\u4e95\u3001\u6d77\u6d0b\u78c1\u73af\u5883\u4e0e\u8d44\u6e90\u8c03\u67e5\u7b49\u9886\u57df\u8d28\u5b50\u3001\u5149\u6cf5\u78c1\u5f3a\u8ba1\u3001\u78c1\u573a\u7ebf\u5708\u7684\u68c0\u5b9a\u6821\u51c6\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u6280\u672f\u6307\u6807<\/strong><\/strong><\/p>\n\n\n\n

a)\u590d\u73b0\u78c1\u573a\uff1a1 nT \uff5e 20 \u03bcT\uff0cU<\/em>=1 nT (k<\/em>=2)\u3002<\/p>\n\n\n\n

20 \u03bcT \uff5e 100 \u03bcT\uff0cU<\/em>=0.6 nT (k<\/em>=2)\u3002<\/p>\n\n\n\n

b)\u78c1\u573a\u566a\u58f0\uff1a\u22646 pT\u3002<\/p>\n\n\n\n

c)\u78c1\u573a\u7a33\u5b9a\u6027\uff1a\u22646 pT\/h\u3002<\/p>\n\n\n\n

0.1 mT \uff5e 50 mT \u6052\u5b9a\u78c1\u573a\u6807\u51c6\u88c5\u7f6e<\/strong><\/strong><\/p>\n\n\n\n

\u88c5\u7f6e\u7b80\u4ecb<\/strong><\/strong><\/p>\n\n\n\n

0.1 mT \uff5e 50 mT\u6052\u5b9a\u78c1\u573a\u6807\u51c6\u88c5\u7f6e\u7528\u4e8e\u5f84\u5411\u548c\u8f74\u5411\u78c1\u5f3a\u8ba1\u7684\u68c0\u5b9a\/\u6821\u51c6\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u6280\u672f\u6307\u6807<\/strong><\/strong><\/p>\n\n\n\n

   a)\u590d\u73b0\u78c1\u573a\uff1a0.1 mT \uff5e 50 mT\uff0cU<\/em>=5\u00d710-4 <\/sup>Br+0.1 \u03bcT\uff08k<\/em>=2\uff09\u3002<\/p>\n\n\n\n

   b)\u78c1\u573a\u5de5\u4f5c\u533a\u57df\uff1a\u03a6<\/em>30 mm\u00d730 mm\u3002<\/p>\n\n\n\n

50 mT \uff5e 3 T\u6052\u5b9a\u78c1\u573a\u6807\u51c6\u88c5\u7f6e<\/strong><\/strong><\/p>\n\n\n\n

\u88c5\u7f6e\u7b80\u4ecb<\/strong><\/strong><\/p>\n\n\n\n

50 mT \uff5e 3 T\u6052\u5b9a\u78c1\u573a\u6807\u51c6\u88c5\u7f6e\u7528\u4e8e\u7279\u65af\u62c9\u8ba1\u7684\u68c0\u5b9a\/\u6821\u51c6\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u6280\u672f\u6307\u6807<\/strong><\/strong><\/p>\n\n\n\n

a)\u590d\u73b0\u78c1\u573a\uff1a50  mT \uff5e 3 T\uff0cU<\/em>rel<\/sub>=0.01% \uff5e 0.2%\uff08k<\/em>=2\uff09\u3002<\/p>\n\n\n\n

0.01 A<\/strong>\u00b7<\/strong>m<\/strong>2 <\/sup><\/strong>\uff5e 10 A<\/strong>\u00b7<\/strong>m<\/strong>2<\/sup><\/strong>\u78c1\u77e9\u6807\u51c6\u88c5\u7f6e<\/strong><\/strong><\/p>\n\n\n\n

\u88c5\u7f6e\u7b80\u4ecb<\/strong><\/strong><\/p>\n\n\n\n

0.01 A\u00b7m2 <\/sup>\uff5e 10 A\u00b7m2<\/sup>\u78c1\u77e9\u6807\u51c6\u88c5\u7f6e\u4e3a\u56fd\u5185\u5c11\u6570\u6b64\u8303\u56f4\u5185\u7684\u78c1\u77e9\u6807\u51c6\uff0c\u7528\u4e8e\u78c1\u77e9\u91cf\u5177\u7684\u68c0\u5b9a\u6821\u51c6\u53ca\u7269\u4f53\u78c1\u77e9\u7684\u6d4b\u8bd5\u7b49\u670d\u52a1\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u6280\u672f\u6307\u6807<\/strong><\/strong><\/p>\n\n\n\n

       a)\u590d\u73b0\u78c1\u77e9\uff1a0.01 A\u00b7m2 <\/sup>\uff5e 10 A\u00b7m2<\/sup>\uff0cU<\/em>rel<\/sub><\/em>=2.0\u00d710-3<\/sup>\uff08k<\/em>=2\uff09\u3002<\/p>\n\n\n\n

   b)\u78c1\u77e9\u5e38\u6570\uff1a0.01 m2 <\/sup>\uff5e 10 m2<\/sup>\uff0cU<\/em>rel<\/sub>= 4.4\u00d710-3<\/sup>\uff08k<\/em>=2\uff09\u3002<\/p>\n\n\n\n

0.01 \u03bcT\/m \uff5e 10 \u03bcT\/m\u68af\u5ea6\u78c1\u573a\u6807\u51c6\u88c5\u7f6e<\/strong><\/strong><\/p>\n\n\n\n

\u88c5\u7f6e\u7b80\u4ecb<\/strong><\/strong><\/p>\n\n\n\n

\u68af\u5ea6\u78c1\u573a\u6807\u51c6\u88c5\u7f6e\u4e3a\u76ee\u524d\u56fd\u5185\u5c11\u6570\u51e0\u5957\u53ef\u51c6\u786e\u5b9a\u91cf\u63a7\u5236\u68af\u5ea6\u78c1\u573a\u7684\u6807\u51c6\u88c5\u7f6e\uff0c\u7528\u4e8e\u77e2\u91cf\u68af\u5ea6\u78c1\u5f3a\u8ba1\u3001\u68af\u5ea6\u7ebf\u5708\u7684\u6821\u51c6\u670d\u52a1\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u6280\u672f\u6307\u6807<\/strong><\/strong><\/p>\n\n\n\n

a)\u80cc\u666f\u78c1\u573a\uff1a20 \u03bcT \uff5e 120 \u03bcT\u3002<\/p>\n\n\n\n

b)\u590d\u73b0\u68af\u5ea6\u78c1\u573a\uff1a0.01 \u03bcT\/m \uff5e 10 \u03bcT\/m\uff0cU<\/em>=15 nT\/m\uff08k<\/em>=2\uff09\u3002<\/p>\n\n\n\n

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d)\u5de5\u4f5c\u533a\u68af\u5ea6\u975e\u7ebf\u6027\uff1a0.1%\u3002<\/p>\n\n\n\n

\u7279\u8272\u6821\u51c6\u88c5\u7f6e<\/strong><\/strong><\/p>\n\n\n\n

\u78c1\u901a\u95e8\u78c1\u5f3a\u8ba1\u6821\u51c6\u88c5\u7f6e<\/strong><\/strong><\/p>\n\n\n\n

\u88c5\u7f6e\u7b80\u4ecb<\/strong><\/strong><\/p>\n\n\n\n

\u78c1\u901a\u95e8\u78c1\u5f3a\u8ba1\u6821\u51c6\u88c5\u7f6e\u53ef\u6821\u51c6\u4e0d\u540c\u6e29\u5ea6\u4e0b\u78c1\u901a\u95e8\u4f20\u611f\u5668\u7684\u51c6\u786e\u5ea6\u3001\u7075\u654f\u5ea6\u3001\u7ebf\u6027\u5ea6\u3001\u566a\u58f0\u3001\u6f02\u79fb\u3001\u6b63\u4ea4\u5ea6\u7b49\u53c2\u6570\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u6280\u672f\u6307\u6807<\/strong><\/strong><\/p>\n\n\n\n

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\"\"\/<\/figure>\n\n\n\n

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