Q. Which of the following gives the most accurate reading for diameter of a thin wire?

निम्नलिखित में से कौन एक पतले तार के व्यास के लिए सबसे सटीक रीडिंग देता है?

A
Ruler
शासक
B
Vernier calipers
वर्नियर कैलीपर्स
C
Screw gauge
पेंच गेज
D
Thermometer
थर्मामीटर

Explanation

Screw gauge (micrometer) can measure very small dimensions (least count: 0.01 mm or 0.001 mm)

Much more precise than a ruler or vernier calipers.

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