JEE Main Physics question
A student performs an experiment for determination of and he commits an error of . For that he takes the time of oscillations with the stop watch of least count , and he commits a human error of . For which of the following data, the measurement of will be most accurate? **[IIT JEE 2006]**
| | | Amplitude of oscillation ---|---|---|--- 5 mm | 0.2 sec | 10 | 5 mm 5 mm | 0.2 sec | 20 | 5 mm 5 mm | 0.1 sec | 20 | 1 mm 1 mm | 0.1 sec | 50 | 1 mm
Solution
For the most accurate measurement of , the length error should be as small as possible, the time measurement should use as many oscillations as possible (reducing the effective error per period), and the
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