Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Physics Measuring Instruments
Which among the following instruments is used for measuring the humidity of the air or a gas?
1
Bolometer
2
Hygrometer
3
Hydrometer
4
More than one of the above
5
None of the above