NEET 2020 Exam Paper (180 Q) - Mock Test

A wire of length $L$, area of cross section $A$ is hanging from a fixed support. The length of the wire changes to $L_1$ when mass $M$ is suspended from its free end. The expression for Young’s modulus is:

The average thermal energy for a mono-atomic gas is: ($k_B$ is Boltzmann constant and $T$, absolute temperature)

Which of the following graph represents the variation of resistivity ($\rho$) with temperature ($T$) for copper?

The color code of a resistance is given as: Yellow, Violet, Brown, Gold. The values of resistance and tolerance, respectively, are:

In Young’s double slit experiment, if the separation between coherent sources is halved and the distance of the screen from the coherent sources is doubled, then the fringe width becomes: