Physics MCQs

852 MCQs (Page 34 of 86)

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SI unit of the coefficient of viscosity is___________________?

A. Kg.m.s-1
B. Kg m-1.s-1
C. Kg.m.s
D. Kg-1.m-1.s-1

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Three students measured the length of a needle with meter rod and recorded as : (i) 0.2145m (ii) 0.21m (iii) 0.214m Which one is a correct record ?

A. Only (i)
B. Only (ii)
C. Only (iii)
D. Both (i) and (ii)

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Absolute uncertainty in a measurement depends upon______________?

A. The magnitude of the measurement
B. Least count of the instrument
C. Percentage error in the measurement
D. All of a, b and c

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Steradian is the SI unit of________________?

A. Plane angle
B. Solid angle
C. Both plane angle and solid angle
D. Neither plane angle nor solid angle

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An ideal standard of measurement of a base quantity has characteristics_______________?

A. Accessible
B. Invariable
C. Transportable
D. Only a and b are correct

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Total uncertainty, in the result obtained from the subtraction of two measurements, is equal to_______________?

A. Sum of their absolute uncertainties
B. The difference of their absolute uncertainties
C. The product of their absolute uncertainties
D. Division of their absolute uncertainties

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Which one is the highest power multiple ?

A. Giga
B. Beta
C. Mega
D. Deca

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One pico stands for_________________?

A. 10 raised to power -15
B. 10 raised to power -12
C. 10 raised to power -9
D. 10 raised to power -6

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Unit of G is ______________?

A. Nm2kg2
B. Nm2kg
C. Nm2kg-2
D. None

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Random errors can be reduced by_______________?

A. Taking zero correction
B. Comparing the instrument with another more accurate one
C. Taking mean of several measurements
D. All methods explained in a, b and c

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