NEET Physics Daily MCQs Practice Questions | 6 August, 2024

The least count of a vernier calipers is 0.01 cm and its zero error is 0.02 cm. While measuring the length of a rod, the main scale reading is 4.8 cm and sixth division on vernier scale is in line with a marking on the main scale. Calculate the length of the rod.

A crystal has a coefficient of expansion $13\times 10^{-7}{\mathrm{/}}^{\circ }C$ in one direction and $231\times 10^{-7}{\mathrm{/}}^{\circ }C$ in every direction at right angles to it. Then cubical coefficient of expansion is:

The quantities $Y=\frac{1}{\sqrt{{\mu }_0{ϵ}_0}},Z=\frac{E}{B},$ and $X=\frac{L}{CR}$ are defined where $C$ - capacitance, $R$ - resistance, $L$ - length, $E$ - electric field, $B$ - magnetic field, and ${ϵ}_0$, ${\mu }_0$ - free space permittivity and permeability respectively. Then:

The position of a particle is given by $\vec{r}=5t\widehat{i}+\frac{5}{2}{t}^2\widehat{j}+6\widehat{k}$, where $t$ in seconds and coefficient have the proper units for $r$ to be in meter. Acceleration of particle will be:

Which of the following statements is correct about photons?

A particle of mass 'M' at rest breaks into two particles of masses $\frac{M}{4}$ and $\frac{3M}{4}$. Find the ratio of their de-Broglie wavelengths:

If the velocity $v$ of a particle moving along a straight line decreases linearly with its displacement from $v=20\text{ m/s}$ to a value approaching zero at $s=30\text{ m}$, then acceleration of the particle at $v=15\text{ m/s}$ is:

Maximum wavelength of emission is obtained for the transition of an electron in a Bohr atom from:

In hydrogen atoms, if the radius of the first orbit of the electron is $R$, then the radius of its fourth orbit will be:

From the top of a tower, a particle is thrown vertically downwards with a velocity of 10 m/s. The ratio of the distances covered by it in the 4th and 3rd second of the motion is: (Take g = 10 m/s²):

An insect trapped in a circular groove of radius 6 cm moves along the groove, steadily and completes 14 revolutions in 100 sec. Linear speed of the motion will be:

A projectile is fired at an angle of 60° with the horizontal. Elevation angle of the projectile at its highest point as seen from the point of projection is:

${}_{82}{}^{290}X\stackrel{\alpha }{\to }Y\stackrel{e^{+}}{\to }Z$

In the nuclear emission stated above, the mass number and atomic number of the product Z respectively, are:

Which of the following have output of AND gate:

A hammer of mass 1 kg moving with a speed of 6 m/s strikes a wall and comes to rest in 0.1s. Calculate, impulse of the force on hammer.