A screw gauge has a pitch of 0.5 mm and 50 divisions on the circular scale. Its least count is: -

In a vernier caliper, 10 divisions of the vernier scale coincide with 9 divisions of the main scale. If each main scale division is 1 mm, the least count is: -

A screw gauge reads +0.03 mm when the jaws are closed (zero error). The actual thickness of a wire that gives a reading of 1.45 mm is: -

The percentage error in measuring the period of a simple pendulum is 2% and in measuring its length is 1%. The maximum percentage error in the value of g is: -

A vernier caliper has 50 divisions on its vernier scale and 49 mm on the main scale corresponds to 50 vernier divisions. The least count is: -