NEET 2017 Question Paper - Code A Mock Test

The de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature $T$ (Kelvin) and mass $m$, is:

One end of string of length $l$ is connected to a particle of mass ‘$m$ ’ and the other end is connected to a small peg on a smooth horizontal table. If the particle moves in circle with speed ‘$v$ ’, the net force on the particle (directed towards center) will be ($T$ represents the tension in the string):

Figure shows a circuit contains three identical resistors with resistance $R=9.0\Omega$ each, two identical inductors with inductance $L=2.0\text{mH}$ each, and an ideal battery with emf $ϵ=18\text{V}$. The current '$i$ ' through the battery just after the switch closed is:

The $x$ and $y$ coordinates of the particle at any time are $x=5t-2t^2$ and $y=10t$ respectively, where $x$ and $y$ are in meters and $t$ in seconds. The acceleration of the particle at $t=2\text{s}$ is:

Suppose the charge of a proton and an electron differ slightly. One of them is $-e$, the other is $(e+\Delta e)$. If the net of electrostatic force and gravitational force between two hydrogen atoms placed at a distance $d$ (much greater than atomic size) apart is zero, then $\Delta e$ is of the order of [Given mass of hydrogen $m_h=1.67\times 10^{-27}\text{kg}$ ]: