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Units, Dimensions and Errors MCQ - Multiple Choice Question and Answer

Units, Dimensions and Errors MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 1
Which of the following does not have the same
dimension?

Electric flux, electric field, electric dipole moment
pressure, stress, Young's modulus
Electromotive force, potential difference, electric
voltage
Heat, potential energy, work done.

Question No : 2
The ratio of the dimension of Planck's constant and
that of moment of inertia is the dimension of

time
frequency
angular momentum
velocity

Question No : 3
Out of the following pair, which one does not have the
same dimensions?

angular momentum and Planck's constant
impulse and momentum
moment of inertia and moment of force
work and torque.

Question No : 4
Parsec is the unit of

time
distance
frequency
angular acceleration

Question No : 5
A. Specific gravity of a fluid is a dimensionless quantity
R . It is the ratio of density of fluid to density of water

both A and R are correct and R is the correct
explanation of A.
both A and R are correct but R is not the correct
explanation of A
A is correct but R is false
both A and R are false

Question No : 6
A force F is given by F =at+ bt2 where t is time, what are the dimension of a and b.

MLT1, MLT0,
MLT3, ML2T4,
MLT-4, MLT-4,
ML-3T, MLT-4,

Question No : 7
Which of the following is not a unit of Young's modulus?

N m-1
N m-2
dyne cm-2
mega pascal