1.Units, Dimensions and Measurement
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નીચેનામાંથી કઈ પરિમાણરહિત રાશિ નથી?

A

સાપેક્ષ ચુંબકીય પરમીએબિલિટિ $\left(\mu_{{r}}\right)$

B

પાવર ફેક્ટર

C

શૂન્યવકાશની પરમીએબીલીટી $\left(\mu_{0}\right)$

D

ક્વોલિટી ફેક્ટર

(JEE MAIN-2021)

Solution

$\left[\mu_{{}}\right]=1 \text { as } \mu_{{r}}=\frac{\mu}{\mu_{{m}}}$

[power factor $(\cos \phi)]=1$

$\mu_T{0}=\frac{{B}_{0}}{{H}}\left(\right.$ unit $\left.={NA}^{-2}\right)$ : Not dimensionless

$\left[\mu_{0}\right]=\left[{MLT}^{-2} {A}^{-2}\right]$

quality factor (Q) $=\frac{\text { Energystored }}{\text { Energy dissipated per cycle }}$

So $Q$ is unitless $\&$ dimensionless.

Standard 11
Physics

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