In an experiment the angles are required to be measured using an instrument.29 divisions of the main scale exactly coincide with the 30 divisions of the vernier scale.If the smallest division of the main scale is half - a - degree (=0.5°), then the least count of the instrument is
one minute
half minute
one degree
half degree
To find the weight of a person ______________ balance is used.
Spring
Platform
Triple beam
Compression Spring
A Vernier Callipers with 1MSD = 1cm has 5 divisions as the vernier. The least count is
0.8 mm
0.8 cm
0.5 cm
0.4 cm
The S.I. unit of time is
light year
second
minutes
hour
If the zeroth division of the vernier is on the left of the zeroth division of the main scale, then the zero error and zero correction are as follows.
Error positive and correction
Error negative and correction positive
Both error and correction are positive
Both error and correction are negative
A vernier calipers has 25 divisions on the vernier scale. One centimeter on the main scale is divided into 20 equal parts. Find the L.C. of the vernier.
0.002cm
0.0025cm
O.02cm
0.025cm
The number of oscillations that the bob makes per second is called its
Amplitude
Frequency
Period of oscillation
Time period
The angular amplitude of the simple pendulum should not be more than which of the following?
200
100
50
10
In railway stations __________ balances are used.
Compression
Roman Steelyard
A mechanical device which combines a main scale and vernier scale is called
Screw gauge
Vernier calipers
Ordinary scale
Spherometer
