Units and its measurements in Physics pptx

Units and its measurements in the world of Physics

1. PHYSICS physics

2. UNITS AND MEASUREMENT Physical Quantities

3. HEIGHT DISTANCE BETWEEN LENGTH Unit METRE

4. mm Vernier calliper

5. Least Count What is the length of this rod?????????? 9cm 9.5cm What is the least count of the scale????????? 1cm .5cm .1cm

6. Vernier calliper Least Count= 1 MSD/No. of divisions of vernier Least Count= .1cm/10 Least Count= .01cm

7. Screw gauge Least Count= .001cm Least Count (LC) = Pitch scale reading/ Number of Divisions on the Circular Scale Pitch of the Screw : This is the distance moved by the spindle per one complete rotation. It’s usually given in millimeters (mm). Pitch = Distance moved / Number of rotations

8. In a screw gauge there are 100 divisions on the Circular scale and screw advances 1 mm in a complete rotation of the screw cap. 200 divisions on the Circular scale and screw advances 1 mm in a complete rotation of the screw cap. 50 divisions on the Circular scale and screw advances .5 mm in a complete rotation of the screw cap. 100 divisions on the Circular scale and screw advances .5 mm in a complete rotation of the screw cap.

9. ZERO ERROR ZERO correction

10. MASS KILOGRAM

11. Beam balance Digital balance Spring balance

12. TIME SECOND

13. TEMPERATURE KELVIN

14. LUMINOUS INTENSITY

15. LUMINOUS INTENSITY Candela

16. Photometers LUMINOUS INTENSITY

17. ELECTRIC CURRENT AMPERE

18. Ammeter Milli ammeter mA Micro ammeter, µA

19. AMOUNT OF SUBSTANCE MOLE

20. FUNDAMENTAL QUANTITIES System International (SI)

21. AREA VOLUME VELOCITY ACEELERATION FORCE MOMENTUM DERIVED QUANTITIES m kg s mol cd A m 2 m 3 m/s ms 2 N (kgms 2 ) kgms -1 K

22. VOLTAGE RESISTANCE