Class 11th Physics Units and Measurement

Which of the following is not a dimensionless quantity?

Option 1 - <p>Relative magnetic permeability  <span class="mathml" contenteditable="false"> <math> <mrow> <mrow> <mo>(</mo> <mrow> <msub> <mrow> <mi>μ</mi> </mrow> <mrow> <mi>r</mi> </mrow> </msub> </mrow> <mo>)</mo> </mrow> </mrow> </math> </span></p>

Option 2 - <p>Power factor</p>

Option 3 - <p>Quality factor   </p>

Option 4 - <p>Permeability of free space  <span class="mathml" contenteditable="false"> <math> <mrow> <mrow> <mo>(</mo> <mrow> <msub> <mrow> <mi>μ</mi> </mrow> <mrow> <mn>0</mn> </mrow> </msub> </mrow> <mo>)</mo> </mrow> </mrow> </math> </span></p>

2 Views|Posted 8 months ago

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Answered by

Vishal Baghel | Contributor-Level 10

8 months ago

Correct Option - 4

Detailed Solution:

$μ_{0} = \frac{B_{0}}{H} = N A^{- 2}$

$[μ_{0}] = [M^{1} L^{1} T^{- 2} A^{- 2}]$

It is not dimensionless

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Physics Units and Measurement 2025

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