NEET Physics Units And Measurement MCQs

Taking into account of the significant figures, what is the value of ${\rm{9}}{\rm{.99}}\,\,{\rm{m -- 0}}{\rm{.0099}}\,\,{\rm{m}}$ ?

A student measured the diameter of a small steel ball using a screw gauge of least count ${\rm{0}}{\rm{.001}}\,\,{\rm{cm}}$. The main scale reading is ${\rm{5}}\,{\rm{mm}}$ and zero of circular scale division coincides with ${\rm{25}}$ divisions above the referene level. If screw gauge has a zero error of ${\rm{ - }}\,{\rm{0}}{\rm{.004}}\,\,{\rm{cm}}$, the correct diameter of the ball is.

In an experiment, the percentage of error occurred in the measurement of physical quantities A, B, C and D are 1%, 2%, 3% and 4% respectively. Then the maximum percentage of error in the measurement X, where ${\rm{X}}\,{\rm{ = }}\,\frac{{{{\rm{A}}^{\rm{2}}}{{\rm{B}}^{{\rm{1/2}}}}}}{{{{\rm{C}}^{{\rm{1/3}}}}{{\rm{D}}^{\rm{3}}}}}$ will be

Planck’s constant $(h)$, speed of light in vacuum (c) and Newton’s gravitational constant (G) are three fundamental constants. Which of the following combinations of these has dimension of length?

Planck’s constant $(h)$, speed of light in vacuum (c) and Newton’s gravitational constant (G) are three fundamental constants. Which of the following combinations of these has dimension of length?

A physical quantity of the dimensions of length that can be formed out of $c,\;G{\rm{ \;and \;}}\frac{{{e^2}}}{{4\pi {\varepsilon _0}}}$ is[ is $c$ velocity of light, $G$ is universal constant of gravitation and $e$ is charge]

A physical quantity of the dimensions of length that can be formed out of $c,\;G{\rm{ \;and \;}}\frac{{{e^2}}}{{4\pi {\varepsilon _0}}}$ is[ is $c$ velocity of light, $G$ is universal constant of gravitation and $e$ is charge]