List of top Physics Questions asked in IIT JAM BT

In 2 N H\(_2\)SO\(_4\), an organic compound shows fluorescence with quantum yield $\phi_f = 0.42$ and fluorescence rate constant $k_f = 5.25 \times 10^{7}\ \text{s}^{-1}$. The observed fluorescence lifetime (correct to 1 decimal place) is ............ ns.
Two sources P and Q produce electromagnetic waves of wavelengths $\lambda$ and $2\lambda$, respectively. Source P ejects a photon with maximum kinetic energy 4.0 eV from a metal with work function 2.0 eV. The maximum kinetic energy (eV) of a photon ejected by source Q from the same metal is .............
Two inductors P and Q having inductance ratio 1:2 are connected in parallel in an electric circuit. The energy stored in the inductors P and Q are in the ratio
The refractive index of diamond is 2.419. If the speed of light in vacuum is $3 \times 10^8$ m s$^{-1}$, then the speed of light in diamond is