Vernier caliper measurement tricks and error

 Micrometer with external measurement

 Micrometer with internal measurement

 Micrometer with depth measurement

Q1: What is the reading of the vernier calipers shown below in mm?

or

(a) 20.0
(b) 26.0
(c) 26.4
(d) 30.0 
(e) 35.4

try to move the simulation to get this state.

Q2: This vernier caliper has a Zero error = + 0.2 mm What is the correct reading of the vernier calipers shown below in mm?



in cm

or in mm




(a) 16.4
(b) 16.6
(c) 16.8
(d) 22.0
(e) 22.2

the answer is 
=main scale + vernier scale - (zero error)
=16.0 + 0.6 - ( 0.2)
= 16.4 mm

Q3 : The diagram shows a dice being measured using vernier calipers. What is the width of the dice, as recorded by the vernier scale? 

(a) 12.0
(b) 12.6
(c) 15.3
(d) 15.6
(e) 18.0 


answer key:
Q1:  the answer is (c). 26.4 mm
Q2: the answer is (a). 16.4 mm
Q3: the answer is (b). 12.6 mm