1).The dimension of a rectangular shape is 5.9 by 4.1mm s measured with a veneer calliper whose minimum scale is 0.05 mm. The percentage error in its surface area is approximately.
(A)0.0033
(B)0.11
(C)0.002
(D)0.03

Ans: 0.11



2).In an experiment, the readings are repeated so as to overcome?
(A)zero error
(B)systematic error
(C)instrument error
(D)random error

Ans: random error



3).Which of the following is not a necessary precaution while performing an experiment on measurement of length?
(A)Avoid parallax error
(B)Close windows to avoid air current.
(C)Avoid zero error.
(D)repeat the measurement

Ans: Close windows to avoid air current.



4).Two separate experiments were performed to determine acceleration of gravity at a point on the surface of the earth. The values and their standard errors are 9.81 ± 0.02 and 9.85 ± 0.01 (m/s2). Hence, the error causing the difference is from which source?
(A)Random
(B)Erratic
(C)Maximum
(D)Systematic

Ans: Random



5).A substance of mass 0.4kg having a density 2700kg/m3 occupies an area 0.02m2. Determine the thickness of the substance.
(A)0.074m
(B)0.74m
(C)7.4m
(D)0.0074m

Ans: 0.0074m



6).A set of readings that are close to one another is said to be
(A)accurate
(B)precise
(C)concise
(D)real

Ans: precise



7).A set of measurement is said to be accurate if it the systematic error in it is
(A)large
(B)small
(C)infinite
(D)zero.

Ans: small



8).Which of the following error is likely to occur when the jaw of the fixed major scale of a vernier calliper are not closed tightly together?
(A)parallax error
(B)zero error
(C)random error
(D)erratic error

Ans: zero error



9).Which instrument would you recommend as the best and most appropriate and to a student in the measurement of the diameter of a metal rod.
(A)Meter rule
(B)Vernier Callipers
(C)Micrometer screw guage
(D)Travelling Microscope

Ans: Micrometer screw guage



10).Which of these statements is NOT CORRECT about erratic errors?
(A)They affect experiment irregularly
(B)They have wide range that can not be corrected easily
(C)They can be predicted
(D)They can arise from faulty instrument

Ans: They can be predicted