MHT CET 2019 3rd May Morning Shift | MHT CET Year Wise Previous Years Questions

The magnifying power of a telescope is nine. When it is adjusted for parallel rays, the distance between the objective and eyepiece is 20 cm . The focal length of objective and eyepiece are respectively

$10 \mathrm{~cm}, 10 \mathrm{~cm}$

$18 \mathrm{~cm}, 2 \mathrm{~cm}$

$15 \mathrm{~cm}, 5 \mathrm{~cm}$

$11 \mathrm{~cm}, 9 \mathrm{~cm}$

MHT CET 2019 3rd May Morning Shift

MCQ (Single Correct Answer)

-0

The SI unit and dimensions of Stefan's constant $\sigma$ in case of Stefan's law of radiation is

$\frac{\mathrm{J}}{\mathrm{m}^3 \mathrm{~s}^4}$, $\left[M^1 L^0 T^{-3} K^{-4}\right]$

$\frac{\mathrm{J}}{\mathrm{m}^2 \mathrm{~s}^4 \mathrm{~K}}$, $\left[M^1 L^0 T^{-3} K^3\right]$

$\frac{\mathrm{J}}{\mathrm{m}^3 \mathrm{~s} \mathrm{~K}^4},\left[\mathrm{M}^{1} \mathrm{L}^0 \mathrm{~T}^{-3} \mathrm{~K}^4\right]$

$\frac{\mathrm{J}}{\mathrm{m}^2 \mathrm{~s} \mathrm{~K}^4},\left[\mathrm{M}^1 \mathrm{~L}^0 \mathrm{~T}^{-3} \mathrm{~K}^{-4}\right]$

MHT CET 2019 3rd May Morning Shift

MCQ (Single Correct Answer)

-0

In a hydrogen atom, an electron of charge $e$ revolves in a orbit of radius $r$ with speed $v$. Then, magnetic moment associated with electron is

$\frac{e v r}{2}$

2 evr

evr

$\frac{e v r}{3}$

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