TS EAMCET 2020 (Online) 14th September Evening Shift | Units & Measurement and Dimensions Question 23 | Physics

In an experiment the angles are required to be measured using an instrument in which 29 divisions of the main scale exactly coincide with the 30 divisions of the vernier scale. If the smallest division of the main scale is half a degree $\left(=0.5^{\circ}\right)$, then the least count of the instrument is

half minute

one degree

half degree

one minute

TS EAMCET 2020 (Online) 14th September Morning Shift

MCQ (Single Correct Answer)

-0

The dimension of $\frac{E^2}{\mu_0}$ in mass $(M)$, length $(L)$ and time

$(T)$ is $(E=$ electric field,

$\mu_0=$ permeability of free space)

$\left[\mathrm{M}^2 \mathrm{~L}^3 \mathrm{~T}^{-2} \mathrm{~A}^2\right]$

$\left[\mathrm{MLT}^{-4}\right]$

$\left[\mathrm{ML}^3 \mathrm{~T}^{-2}\right]$

$\left[M L^4 \mathrm{~T}^{-4}\right]$

TS EAMCET 2020 (Online) 14th September Morning Shift

MCQ (Single Correct Answer)

-0

The surface tension of 70 dynes $/ \mathrm{cm}$ is equal to

$70 \mathrm{~N} / \mathrm{m}$

$70 \times 10^{-3} \mathrm{~N} / \mathrm{m}$

$7 \times 10^2 \mathrm{~N} / \mathrm{m}$

$7 \times 10^3 \mathrm{~N} / \mathrm{m}$

TS EAMCET 2020 (Online) 11th September Evening Shift

MCQ (Single Correct Answer)

-0

The dimension of angular momentum in mass $(M)$, length $(L)$ and time $(T)$ is

$\left[\mathrm{MLT}^{-1}\right]$

$\left[\mathrm{ML}^{-1} \mathrm{~T}^{-1}\right]$

$\left[\mathrm{ML}^2 \mathrm{~T}^{-1}\right]$

$\left[\mathrm{ML}^{-1} \mathrm{~T}^{-2}\right]$

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