Question 132: Units , Dimensions and Error Analysis

Question

Which of the following is not a dimensionless quantity?

Accepted Answer

[$$\mu$$
r
] = 1 as $$\mu$$
r
= $${\mu  \over {{\mu _m}}}$$
[power factor (cos $$\phi$$)] = 1
$${\mu _0} = {{{B_0}} \over H}$$ (unit = NA
$$-$$2
) : Not dimensionless
[$$\mu$$
0
] = [MLT
$$-$$2
A
$$-$$2
]
quality factor $$(Q) = {{Energy\,stored} \over {Energy\,dissipated\,per\,cycle}}$$
So Q is unitless & dimensionless.

Answer

Relative magnetic permeability ($$\mu$$
r
)

Answer

Power factor

Answer

Permeability of free space ($$\mu$$
0
)

Answer

Quality factor

Units , Dimensions and Error Analysis

Which of the following is not a dimensionless quantity?

Choose the correct answer: