NEET 2018 Question Paper Mock Test

In a p-n junction diode, change in temperature due to heating:

In the combination of logic gates, where inputs $A$ and $B$ are fed into two NAND gates whose outputs are then fed into a third NAND gate, the output $Y$ can be written as:

An em wave is propagating in a medium with a velocity $\vec{V}=V\hat{i}$. The instantaneous oscillating electric field of this em wave is along $+y$ axis. Then the direction of oscillating magnetic field of the em wave will be along:

The refractive index of the material of a prism is $\sqrt{2}$ and the angle of the prism is $30^{\circ }$. One of the two refracting surfaces of the prism is made a mirror inwards, by silver coating. A beam of monochromatic light entering the prism from the other face will retrace its path (after reflection from the silvered surface) if its angle of incidence on the prism is:

An object is placed at a distance of $40\text{cm}$ from a concave mirror of focal length $15\text{cm}$. If the object is displaced through a distance of $20\text{cm}$ towards the mirror, the displacement of the image will be: