1.

How To Find Out The Least Count Of A Universal Bevel Protractor?

Answer»
  • 1 degree= 60 MINUTES 
  • 1 MINUTE= 60 seconds
  • 12 DIVISION on vernier scale = 23 degree 
  • one division on vernier scale = 23/12 = 23*60/ 12= 115 minutes
  • 1 vernier scale division is less than 2 degree
  • so, value of 2 degree on dial = 2*60 = 120
  • Value of one vernier scale division = 115
  • Least count = 120-115= 5 minutes


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