MARIA K PAUL
from
DON BOSCO SCHOOL OF EXCELLENCE EGMORE, CHENNAI
Subject :NSO Class : Class 6
Which one of these is true about measuring length using a ruler scale? The position of eye should be
a. Vertically above the 0-end
b. Vertically above the point where the measurement
is to be taken
c. Anywhere according to one's convenience.
Ab. only
Ba. only
Ca. and b.
Db. and c.
Isn't option c correct?
Ans 1:
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Rahil
from
Delhi Public School Faridabad, Faridabad
Class : Class 7
No as it causes a parallax error.
It should be option A.
If you don't believe me then try it yourself with a scale and measuring a line segment from different eye positions.
You will see that, the measurement varies slightly every time. That's why option A is correct.
Ans 4:
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PARNIKA SINGH
from
GYAN GANGA EDUCATION ACADEMY, RAIPUR
Class : Class 10
GIVEN ANSWER IS NOT CORRECT AS A IS THE CORRECT ANSWER
Ans 5:
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Ans 6:
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aritroray
from
Chirec International School, Hyderabad
Class : Class 8
I think it should be C because otherwise the zero end can shift slightly (in our viewpoint) and measurement will be wrong. So both statements a and b are correct and the answer is C.
Ans 9:
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chittaranjan kar
from
MLZS, Jaipur
Class : Class 3
No guys. Human eye can't focus simultaneously on two points. To avoid parallax error , eye should be on the point of measurement to be taken.Hence given answer is correct in my view. You may comment.
Ans 10:
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sujata patel
from
Podar International, Pune
Class : Class 6
it is simple that while measuring, at first you eye must be vertically above 0
Ans 11:
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Mansi Sadavarti
from
Vibgyor High, Pune
Class : Class 7
I agree with Aritroray the answer should be C