Errors in Measurement NEET Questions

Physics - Physics and Measurement
Errors in Measurement

Errors in Measurement MCQ Questions


13.
If Z = A + B, the maximum absolute error in Z is:
A.
ΔZ = ΔA − ΔB
B.
ΔZ = ΔA × ΔB
C.
ΔZ = ΔA + ΔB
D.
ΔZ = ΔA / ΔB
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ANSWER :
C. ΔZ = ΔA + ΔB
14.
If Z = A − B, where A = 5.0 ± 0.2 and B = 3.0 ± 0.1, then Z is:
A.
2.0 ± 0.1
B.
2.0 ± 0.2
C.
2.0 ± 0.3
D.
2.0 ± 0.02
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ANSWER :
C. 2.0 ± 0.3
15.
Length l = 16.2 ± 0.1 cm and breadth b = 10.1 ± 0.1 cm. The error in perimeter P = 2(l + b) is:
A.
±0.1 cm
B.
±0.2 cm
C.
±0.4 cm
D.
±0.02 cm
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ANSWER :
C. ±0.4 cm
16.
Two resistances R₁ = 100 ± 3 Ω and R₂ = 200 ± 4 Ω are connected in series. The total resistance and its error are:
A.
300 ± 1 Ω
B.
300 ± 7 Ω
C.
300 ± 3.5 Ω
D.
300 ± 12 Ω
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ANSWER :
B. 300 ± 7 Ω
17.
The length and breadth of a rectangle are 5.7 ± 0.1 cm and 3.4 ± 0.2 cm. The error in area A = l × b is approximately:
A.
±0.3 cm²
B.
±1.4 cm²
C.
±0.3%
D.
±1.4%
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ANSWER :
B. ±1.4 cm²
18.
A quantity is measured as Z = A + B − C. The maximum absolute error ΔZ is:
A.
ΔA + ΔB − ΔC
B.
ΔA − ΔB + ΔC
C.
ΔA + ΔB + ΔC
D.
|ΔA − ΔB − ΔC|
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ANSWER :
C. ΔA + ΔB + ΔC
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