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Q.

The quantities $x = \frac{1}{\sqrt{μ_{0} \in_{0}}}, y = \frac{E}{B}$ and $z = \frac{l}{C R}$ are defined where C-capacitance, R-Resistance, $l$ -length, E-Electric field, B-magnetic field and $\in_{0}, μ_{0} -$ free space permittivity and permeability respectively. Then :

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a

Only x and z have the same dimension

b

Only x and y have the same dimension

c

Only y and z have the same dimension

d

x,y and z have the same dimension

answer is D.

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Detailed Solution

$\begin{array}{l} x = \frac{1}{\sqrt{μ_{0} ε_{0}}} \\ \Rightarrow d i m e n s i o n a l f o r m u l a o f x = [M^{0} L^{1} T^{- 1}] \\ y = \frac{E}{B} \\ \Rightarrow [y] = [M^{0} L^{1} T^{- 1}], \\ [z] = \frac{[L]}{[T]} = [L^{1} T^{- 1}] \end{array}$

So all quantities have same dimensional formula of velocity or speed.

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