MEASUREMENT & UNIT
1.What is the unit of potential difference ?
2.Knot is used for measuring
Speed of ships
3. Unit of work
4.Unit of viscosity of fluid
5.Decibel is the unit for measuring the intensity of
6. What is the S.I. unit of pressure?
7.What is the S.I. unit of magnetic field strength?
Ampere per metre
8.Which is the smallest unit of distance used in Nuclear Physics?
9.The unit used to measure radio activity
10.What is the unit of frequency?
11.The power of the Engine is calculated by
Horse Power (One HorsePower = 746 watt)
12.The unit of Capacitance
13.The unit of Inductance
14.The unit of atmospheric pressure
Bar (One Bar=76cm of Hg)
15. Unit of force
16.Unit of Electric charge
17.Unit of Electric resistance
INSTRUMENTS AND ITS USES
18.Which instrument converts mechanical energy into electrical energy?
19.Which instrument converts light energy into electric energy?
Photo electric cel
20.Which instrument used to convert A.C. current to D.C. current?
21.Which is the instrument employed to change the voltage in an electric circuit?
22.What is the use of Altimeter?
To measure the altitude
23.What is the use of Ammeter?
To measure the flow of electric current in a circuit
24.What is the use of Anemometer?
To measure the force or speed of the wind
25.What is the use of Electroscope?
To measure the electrostatic charge
26.What is the use of Calorimeter?
To measure the amount of heat
27.What is the use of Speedometer?
To indicate the speed of a vehicle
28.What is the use of Fathometer?
To measure the depth of water (1 fathom = 6 ft)
29.What is the use of Periscope?
To observe objects of the surface from the submarine
30.What is the purpose of Mariner’s compass?
To find out the direction of the ship in the sea
31.What is the use of Steroscope?
To see the photos taken by two cameras placed at two different angles
33.What is the use of Hygrometer?
To measure the humidity of atmosphere.
34.What is the use of Galvanometer?
To measure electric currents
35.What is the use of Microscope?
To magnify tiny object
36.What is Lactometer ?
device used to measure the relative density of milk to determine its purity
37.What is Pyrometer ?
Used to record hightemperature from a great distance
38.What is Hydrophone ?
It is used for recording of sound inside water
39.What is an electric oscillator ?
It converts Direct Current into Alternating Current