Home Physics Experimental Skills JEE Main 2024 - (Experimental Physics) While measuring diameter of wire using screw…
Physics Experimental Skills JEE Main 2024 - (Experimental Physics) MCQ (Single Correct)

While measuring diameter of wire using screw gauge the following readings were noted. Main scale reading is and circular scale reading is equal to 42 divisions. Pitch of screw gauge is and it has 100 divisions on circular scale. The diameter of the wire is . The value of is:

A
21
B
142
C
71
D
42

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The correct answer is:
C

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