Errors in Measurement NEET Questions

Physics - Physics and Measurement

Errors in Measurement MCQ Questions


7.
Random errors in a measurement can be reduced by:
A.
Calibrating the instrument
B.
Taking the arithmetic mean of a large number of observations
C.
Correcting for zero error
D.
Using a more sensitive instrument
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ANSWER :
B. Taking the arithmetic mean of a large number of observations
8.

The mean of five measurements is 4.80 cm. The individual readings are 4.82, 4.78, 4.81, 4.79, 4.80 cm. The mean absolute error is:

A.

0.006 cm

B.

0.01 cm

C.

0.012 cm

D.

0.004 cm

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ANSWER :

C. 0.012 cm

9.
Which of the following statements is true about systematic errors?

NEET - 2019

A.
They occur due to unpredictable fluctuations.
B.
They can be reduced by improving experimental techniques.
C.
They are random in nature.
D.
They cannot be corrected.
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ANSWER :
B. They can be reduced by improving experimental techniques.
10.
If the true value of a length is 5.00 cm and the measured value is 4.95 cm, the absolute error and percentage error are respectively:
A.
0.05 cm and 1%
B.
0.05 cm and 0.5%
C.
0.5 cm and 1%
D.
0.05 cm and 10%
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ANSWER :
A. 0.05 cm and 1%
11.
The relative error in measurement of mass 1.02 g (accurate to ±0.01 g) is approximately:
A.
±0.1%
B.
±1%
C.
±10%
D.
±0.01%
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ANSWER :
B. ±1%
12.
Two measurements of mass are 1.02 g and 9.89 g, both accurate to ±0.01 g. The measurement with SMALLER relative error is:
A.
1.02 g
B.
9.89 g
C.
Both have same relative error
D.
Cannot be determined
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ANSWER :
B. 9.89 g