Name the instrument used to measure the relative density of liquids.
Hygrometer
Hydrometer
Altimeter
Tribometer
Time of one vibration or 1/2 oscillation of a seconds pendulum is
2 second
Period of oscillation
1 second
1 minute
The number of oscillations that the bob makes per second is called its
Amplitude.
Frequency.
Period of oscillation.
Time period.
The least count of ordinary scale is
1 m
1 mm
1 cm
0.1 mm
In S.I system the fundamental unit of current strength is
Ampere
Weber
Kelvin
Decibel
A mechanical device which combines a main scale and vernier scale is called
Screw gauge
Vernier calipers
Spherometer
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 negative.
Error negative and correction positive.
Both error and correction are positive.
Both error and correction are negative.
S.I. unit of current strength
Litre
Volt
Candela
In M.K.S system the fundamental unit of mass is
Gram.
Kilogram .
Milligram.
Pound.
One mean solar day is eqaual to
86400 seconds
8640 seconds
864 seconds
1/86400 seconds
