Meter Scale NEET Questions

Physics - Experimental Skills

Meter Scale MCQ Questions


7.
To minimise parallax error while reading a metre scale, the eye should be:
A.
As far away as possible
B.
At an angle of 45°
C.
Directly above the marking, perpendicular to the scale
D.
Anywhere convenient
😑 View Answer Rough Work Error
ANSWER :
C. Directly above the marking, perpendicular to the scale
8.
Why do we generally not use the very ends of a metre scale (0 mark or 100 cm mark) to measure?
A.
It looks better to start from the middle
B.
It is forbidden by NCERT
C.
The ends of the scale may be worn out or damaged, leading to error
D.
The ends are not graduated
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ANSWER :
C. The ends of the scale may be worn out or damaged, leading to error
9.
If a measurement made by a metre scale is 23.5 cm, the absolute uncertainty is:
A.
± 0.1 cm (or ±1 mm)
B.
± 0.01 cm
C.
± 1 cm
D.
± 0.001 cm
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ANSWER :
A. ± 0.1 cm (or ±1 mm)
10.
Why is the metre scale less accurate than a Vernier calipers?
A.
It cannot be read clearly
B.
It is made of plastic
C.
Its least count (1 mm) is greater than the Vernier calipers' least count (0.1 mm)
D.
It is shorter than a Vernier calipers
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ANSWER :
C. Its least count (1 mm) is greater than the Vernier calipers' least count (0.1 mm)
11.
A student reads the length of a pencil starting from 5.0 cm to 19.5 cm on a metre scale. The length of the pencil is:
A.
24.5 cm
B.
19.5 cm
C.
5.0 cm
D.
14.5 cm
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ANSWER :
D. 14.5 cm
12.
If a body's length is measured 5 times as 25.4, 25.5, 25.3, 25.4, 25.4 (all cm), the mean length is:
A.
25.45 cm
B.
25.30 cm
C.
25.5 cm
D.
25.40 cm
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ANSWER :
D. 25.40 cm