NEET 2017 Question Paper - Code A Mock Test

Two rods $A$ and $B$ of different materials are welded together as shown in figure. Their thermal conductivities are $K_1$ and $K_2$. The thermal conductivity of the composite rod will be:

The diagrams below show regions of equipotentials. A positive charge is moved from $A$ to $B$ in each diagram.

The ratio of wavelengths of the last line of Balmer series and the last line of Lyman series is:

Young’s double slit experiment is first performed in air and then in a medium other than air. It is found that $8^{th}$ bright fringe in the medium lies where $5^{th}$ dark fringe lies in air. The refractive index of the medium is nearly:

A particle executes linear simple harmonic motion with an amplitude of $3\text{cm}$. When the particle is at $2\text{cm}$ from the mean position, the magnitude of its velocity is equal to that of its acceleration. Then its time period in seconds is: