The errors in the measurement which arise due to unpredictable fluctuations in temperature and voltage supply are
personal errors
least count errors
random errors
instrumental errors
The angle of 1' (minute of arc) in radian is nearly equal to
In an experiment, four quantities a, b, c and d are measured with percentage error 1%, 2%, 3% and 4%, respectively. Quantity P is calculated as follows:
error in P is
A student measured the diameter of a small steel ball using a screw gauge of least count 0.001 cm. The main scale reading is 5 mm and zero of circular scale division coincides with 25 divisions above the reference level.
If screw gauge has a zero error of -0.004 cm, the correct diameter of the ball is
In an experiment, the percentage of error occurred in the measurement of physical quantities A, B, C and D are 1%, 2%, 3% and 4%, respectively. The maximum percentage of error in the measurement X, where
, will be
A screw gauge has least count of 0.01 mm and there are 50 divisions in its circular scale. The pitch of the screw gauge is