please answer these questions fast.....
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I)
vc=1msd-1vsd
vc=1-(9/10)
vc=0.1mm/0.01cm
ii)
division coinciding=5
therefore zero error =-(10-5)*0.0 1
-0.05
2)
Main scale reading =3.2cm
vernier scale reading=division coinciding*vc
=> 3*0.01=0.03
therefore total reading or length of rod=3.2+0.03
=3.23cm
vc=1msd-1vsd
vc=1-(9/10)
vc=0.1mm/0.01cm
ii)
division coinciding=5
therefore zero error =-(10-5)*0.0 1
-0.05
2)
Main scale reading =3.2cm
vernier scale reading=division coinciding*vc
=> 3*0.01=0.03
therefore total reading or length of rod=3.2+0.03
=3.23cm
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