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in Physics by (25.0k points)
एक विभवमापी के तार की प्रतिरोधकता `40 xx 10^(-8)` ओम - मीटर तथा अनुप्रस्थ - काट का क्षेत्रफल `8 xx 10^(-6)" मीटर"^(2)` है । इसमें `0.2` ऐम्पियर की धारा प्रवाहित होती है । तार की विभव - प्रवणता ( वोल्ट /मीटर ) है :
A. `0.01`
B. 10
C. `1.6 xx 10^(-2)`
D. 5

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