JEE Main · PhysicsMedium
A student measures the thickness of a wire using a screw gauge with a pitch of and divisions on the circular scale. The reading is on the main scale and divisions on the circular scale. What is the measured thickness?
- A.
- B.
- C.
- D.
Show correct answer & step-by-step solution
Correct answer: A —
Solution
- The least count is .
- The circular scale reading is .
- The total reading is .
- Hence the answer is (A).
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