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Units and Measurements question

2008 · Shift 1 · Q47
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Units and Measurements question

2008 · Shift 1 · Q47

JEE AdvancedPhysicsUnits and MeasurementsMCQ+3 / −1

Student I, II and III perform an experiment for measuring the acceleration due to gravity (g) using a simple pendulum. They use different length of the pendulum and/or record time for different number of oscillations. The observations area shown in the table.

Least count for length = 0.1 cm

Least count for time = 0.1 s

Student Length of the
pendulum
(cm)		 No. of
oscillations
(n)		 Total time
for(n)
oscillations
(s)		 Time
periods
(s)
I 64.0 8 128.0 16.0
II 64.0 4 64.0 16.0
III 20.0 4 36.0 9.0

If EI, EII and EIII are the percentage errors in g, i.e., (△gg×100)\left(\frac{\triangle g}g\times100\right)(g△g​×100) for students I, II and III, respectively,then

  1. A
    EI = 0
  2. B
    EI is minimum
  3. C
    EI = EII
  4. D
    EII is maximum
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