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Units and Measurements question

2017 · Shift 2 · Q41
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Units and Measurements question

2017 · Shift 2 · Q41

JEE AdvancedPhysicsUnits and MeasurementsMCQ+3 / −0.75
A person measures the depth of a well by measuring the time interval between dropping a stone and receiving the sound of impact with the bottom of the well. The error in his measurement of time is δT=0.01\delta T = 0.01δT=0.01 seconds and he measures the depth of the well to be L=20L=20L=20 meters. Take the acceleration due to gravity g=10ms−2g = 10m{s^{ - 2}}g=10ms−2 and the velocity of sound is 300ms−1300m{s^{ - 1}}300ms−1. Then the fractional error in the measurement, δL/L,\delta L/L,δL/L, is closest to
  1. A
    0.2%0.2\%0.2%
  2. B
    1%1\%1%
  3. C
    3%
  4. D
    5%
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