Ammeter
Measures electric current.
Anything that can be measured directly or indirectly. The fundamental properties of our universe.
A standard used for making comparisons in measurements. It gives numbers a physical meaning.
The process of connecting numbers with physical quantities and phenomena.
The scientific study of measurement. The science of precision and accuracy.
Centimeter Gram Seconds
Foot Pound Seconds
Meter Kilogram Seconds
International System
A physical quantity which has only magnitude but no direction.
Examples: Mass, speed, time, work, temperature.
A physical quantity which has both magnitude as well as direction.
Examples: Velocity, weight, momentum, displacement.
Physical quantities which are independent of other physical quantities.
Examples: Length, mass, time etc.
Physical quantities which are dependent on fundamental quantities.
Examples: Speed, velocity, area etc.
| S.N | Physical Quantity | Unit | Abbreviation |
|---|---|---|---|
| 1 | Mass | Kilogram | kg |
| 2 | Length | Meter | m |
| 3 | Time | Second | sec |
| 4 | Temperature | Kelvin | K |
| 5 | Amount of substance | Mole | mol |
| 6 | Electric current | Ampere | A |
| 7 | Luminous intensity | candela | cd |
Electric current: Ampere (A)
Volume: Cubic metre (m³)
Temperature: Kelvin (K)
Area: Metre square (m²)
Amount of substance: Mole (mol)
Electric power: Kilowatt (KW)
Force: Newton (N)
Radioactivity: Currie
Pressure: Pascal (Pa)
Earthquake: Rictor (Richter)
Work / energy: Joule (J)
Heat: Joules
Power: Watt (W)
Length (atomic): Angstrom (Å)
Angle: Radians (Rad)
Purity of gold /Gems: Carat
Frequency: Hertz (Hz)
Speed: Meter/sec (m/s)
Charge: Coulomb (C)
Displacement: Meters (m)
Resistance: Ohm (Ω)
Intensity of sound: Decibels (dB)
Power of lens: Dioptre (D)
Solar distance: Light year
Inductance: Henry (H)
Potential difference/voltage: Volt (V)
Conductance: Farad (F)
Velocity: Meter/sec (m/s)
Viscosity: Poise
Acceleration: Metre/sec² (m/s²)
Resistivity: Ohm-metre (Ω·m)
Impulse: Newton-second (N·s)
10²¹ Zetta (Z)
10¹⁵ Peta (P)
10¹² Tera (T)
10⁹ Giga (G)
10⁶ Mega (M)
10³ Kilo (k)
10⁻² Centi (c)
10⁻³ Milli (m)
10⁻⁶ Micro (µ)
10⁻⁹ Nano (n)
10⁻¹⁰ Angstrom (Å)
10⁻¹² Pico (p)
10⁻¹⁵ Femto/Fermi (f)
10⁻²¹ Zepto (z)
Measures electric current.
Measures altitude in aircraft.
Measures atmospheric pressure.
To see objects above eye level.
Measures temperature.
Measures potential difference (voltage).
Reduces or increases electric current.
Measures humidity in the air.
Converts mechanical to electrical energy.
Converts electrical to mechanical energy.
Measures viscosity in liquids.
Records wind velocity.
Mixes petrol vapours and air.
Measures accurate time.
Projects films and images.
Measures heat generated by fuels.
Measures depth of the Ocean.
Measures specific gravity of liquids.
Records underwater sound.
Measures purity of milk or any liquids.
Carries sound over long distances.
Measures or records sound.
Measures very small length (LC 0.001cm).
Measures a small length (LC 0.01 cm).
Measures pressure of gas.
Magnifies micro-objects (10⁻³).
Measures radiation energy.
Regulates temperature.
Measures temperature by change in electric current.
Observes distant or heavenly objects.
Records high temperature at a great distance.
For reducing sound (likely means ‘reproducing’).
Converts photo (light) energy into electrical energy.
Measures intensity of light.
Measures humidity in the air.
Measures angular elevation.
Measures horizontal and vertical angles.
Measures small thickness / curvature.
Measures the distance covered by vehicles.
Transmits television broadcast across continents.
1. The SI unit of power is
2. The loudness of sound is measured in
3. The unit of measuring Astronomical Distance is
4. What is the unit of Resistance?
5. The SI unit of power of lens is
6. What is the SI unit of mass?
7. The device used to measure the humidity of liquids (Note: text likely means ‘specific gravity of liquids’ or ‘humidity of air’)
8. What is the SI unit of weight?
9. Unit for measuring energy
10. Ampere is a unit of
11. The ‘parsec’ is the unit of
12. What is the SI unit of thermodynamic temperature?
13. The unit Nautical mile per hour is used to measure the speed of which of the following?
14. The SI Unit of Charge is –
15. Density of the material of a substance is its mass divided by
16. The physical quantities which has magnitude only and direction is not considered is called
17. Which of the following is not a vector quantity?
18. Calorie is the unit of
19. Kilowatt hour is the unit of
20. The SI unit of frequency
21. One micron is equal to
22. 1 joule is equal to
23. How many watts are there in 1 horsepower
24. What is the unit of specific resistance
25. Which of the following is not the unit of energy
26. What is the SI unit pressure
27. The unit of power is
28. Purity of milk is measured by which equipment
29. SI unit of force
30. The specific gravity of liquid is measured by
31. A light year is a unit of
32. The quantity which has both magnitude and direction is known as
33. Radian is the SI unit of
34. Which among the following is a fundamental quantity
35. Ampere is the SI unit of
36. Newton-sec is the unit of
37. Which instrument is used to measure the atmospheric pressure
38. The unit of surface tension is
39. The unit of speed in seawater is