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
A physical balance is used in the laboratories, to find out the mass of a substance correct to a
Kilogram
Gram
Ton
Milligram
In railway stations __________ balances are used.
Platform
Triple beam
Compression
Roman Steelyard
The S.I. unit of time is
light year
second
minutes
hour
To find the weight of a person ______________ balance is used.
Spring
Compression Spring
Second is the time taken for 9,192,631,770 vibrations of a _____________ atom of atomic mass number 133.
Iodine
Calcium
Cesium
Radium
While measuring the length of a piece of a chalk by Vernier calipers. The main scale reading is found to be between 5.2cm and the 5th division of a vernier scale is found to coincide with a division on the main scale. Find the length of the chalk if the least count of the vernier is 0.01cm and zero error is 0.02cm.
5.71cm
5.27cm
5.23cm
5.25cm
The time period of a simple pendulum is directly proportional to the _________ of the length of the pendulum.
Square
Square root
Cube
Cube root
The instrument which can measure time most accurately is
Sundial
Wall clock
Atomic clock
Water clock
Time of one vibration or 1/2 oscillation of a seconds pendulum is
2 second
Period of oscillation
1 Second
1 minute