JEEBench

phy

JEE Adv 2016 Paper 1

B

1

MCQ

In a historical experiment to determine Planck's constant, a metal surface was irradiated with light of different wavelengths. The emitted photoelectron energies were measured by applying a stopping potential. The relevant data for the wavelength $(\lambda)$ of incident light and the corresponding stopping potential $\left(V_{0}\right)$ are given below : \begin{center} \begin{tabular}{cc} \hline $\lambda(\mu \mathrm{m})$ & $V_{0}($ Volt $)$ \\ \hline 0.3 & 2.0 \\ 0.4 & 1.0 \\ 0.5 & 0.4 \\ \hline \end{tabular} \end{center} Given that $c=3 \times 10^{8} \mathrm{~m} \mathrm{~s}^{-1}$ …

phy

JEE Adv 2016 Paper 1

D

2

MCQ

A uniform wooden stick of mass $1.6 \mathrm{~kg}$ and length $l$ rests in an inclined manner on a smooth, vertical wall of height $h(<l)$ such that a small portion of the stick extends beyond the wall. The reaction force of the wall on the stick is perpendicular to the stick. The stick makes an angle of $30^{\circ}$ with the wall and the bottom of the stick is on a rough floor. The reaction of the wall on the stick is equal in magnitude to the reaction of the floor on the stick. The ratio $h / l$ and the frictional force $f$ at the bottom of the stick are $\left(g=10 \mathrm{~ms} \mathrm{~s}^ …