JEE Main 20198 Apr, Evening shiftPhysicsMediumUnits and Measurements122× since 2002
In a simple pendulum experiment for
determination of acceleration due to gravity (g),
time taken for 20 oscillations is measured by
using a watch of 1 second least count. The
mean value of time taken comes out to be
30 s. The length of pendulum is measured by
using a meter scale of least count 1 mm and the
value obtained is 55.0 cm. The percentage
error in the determination of g is close to :-