JEE Main · PhysicsHard
A student measures the thickness of a wire using a screw gauge with a pitch of $1\text{ mm}$ and $100$ divisions on the circular scale. If the zero error is $+0.03\text{ mm}$ and the observed reading is $2.45\text{ mm}$, what is the corrected thickness?
- A.$2.42\text{ mm}$
- B.$2.48\text{ mm}$
- C.$2.45\text{ mm}$
- D.$2.43\text{ mm}$
Show correct answer & step-by-step solution
Correct answer: A — $2.42\text{ mm}$
Solution
The corrected reading is given by . Thus, .
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