Q. Which of the following methods is most suitable to measure the diameter of a small spherical ball?

एक छोटी गोलाकार गेंद का व्यास मापने के लिए निम्नलिखित में से कौन सी विधि सबसे उपयुक्त है?

A
Meter scale
मीटर स्केल
B
Screw gauge
पेंच गेज
C
Stopwatch
स्टॉपवॉच
D
Thermometer
थर्मामीटर

Explanation

A screw gauge (micrometer) is ideal for measuring small diameters with high precision (least count of 0.01 mm or 0.001 mm), especially for spherical or cylindrical objects.

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