Qualification > Sciences
IGCSE PHYSICS DOUBTS HERE !!!!
~ Miss Relina ~:
--- Quote from: Vin on May 11, 2011, 09:16:57 pm ---Least count = 0.01 cm
Vernier scale reading(division) = 4 (4th division's coinciding)
main scale reading = 0.10 cm (the 0th division's right after 0.1 and before 0.2, so in between two values you always take the lower value )
Total reading = main scale reading + (vernier scale division x least count)
TR = MSR + (VSR x LC)
= 0.10 + (4 x 0.01)
= 0.10 + 0.04
= 0.14 cm
--- End quote ---
thank you very much :D
ah i wanna ask also does this also apply for the micrometer or it does not have zero error and if itt does is it by the same method u showed to me
Thanks in advance
SauD~:
--- Quote from: Vin on May 11, 2011, 09:16:57 pm ---Least count = 0.01 cm
Vernier scale reading(division) = 4 (4th division's coinciding)
main scale reading = 0.10 cm (the 0th division's right after 0.1 and before 0.2, so in between two values you always take the lower value )
Total reading = main scale reading + (vernier scale division x least count)
TR = MSR + (VSR x LC)
= 0.10 + (4 x 0.01)
= 0.10 + 0.04
= 0.14 cm
--- End quote ---
Good doubt relina.. and i guess micrometer and calipher are same things :-\
Vin i didn't understand :(
Master_Key:
--- Quote from: $~SauD~$ on May 12, 2011, 09:16:34 am ---Good doubt relina.. and i guess micrometer and calipher are same things :-\
Vin i didn't understand :(
--- End quote ---
Vernier Calliper.
elemis:
--- Quote from: Relina on May 11, 2011, 10:02:13 pm ---thank you very much :D
ah i wanna ask also does this also apply for the micrometer or it does not have zero error and if itt does is it by the same method u showed to me
Thanks in advance
--- End quote ---
Are you sure you understand what a zero error is ?
Vin:
--- Quote from: $~SauD~$ on May 12, 2011, 09:16:34 am ---Good doubt relina.. and i guess micrometer and calipher are same things :-\
Vin i didn't understand :(
--- End quote ---
okay, there are certain methods to go about on the calculations for both the instruments.
you have to understand first WHY do you actually use those instruments rather than a regular ruler. The simple and primary reason being they provide more accuracy. There are others as well - they can calculate the diameter accurately etc.
vernier callipers (vc) and micrometer gauge (mg) are NOT the same thing however the theoretical calculation is similar.
VC has a least count of 0.01 cm so it can calculate the diameter of an object to 3 sfg.
MG has an LC of 0.001 cm
^ These are standard least counts for instruments. This can vary too.
Google the rest please because theres a lot to learn and i cannot possibly type everything because i have to go study chemistry.
http://www.tutorvista.co.uk/content/physics/physics-i/measurement-and-experimentation/vernier-callipers-animation.php
http://www.tutorvista.co.uk/content/physics/physics-i/measurement-and-experimentation/screw-gauge.php
^ These should cover pretty much everything up including the calculation for LC and zero error.
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