5 Official GATE PH Questions with Verified Solutions & Answer Keys
The molecule $^{17}\text{O}_2$ is...
A student sets up Young's double slit experiment with electrons of momentum p incident normally on the slits of width w separated by distance d. In order to observe interference fr...
Frequency bandwidth $\Delta \nu$ of a gas laser of frequency $\nu$ Hz is $\Delta \nu = \frac{2\nu}{c} \sqrt{\frac{\alpha}{A}}$, where $\alpha = 3.44 \times 10^6 \text{ m}^2 \text{s...
Atomic numbers of V, Cr, Fe and Zn are 23, 24, 26 and 30, respectively. Which one of the following materials does NOT show an electron spin resonance (ESR) spectra?...
An atom has two energy levels with energy difference 2.2 eV between them. A gas of these atoms is with 8 × 1020 atoms in the upper state and 5 × 1020 atoms in the lower state. Igno...