9 Official GATE PH Questions with Verified Solutions & Answer Keys
The dielectric constant of a material at optical frequencies is mainly due to (A) ionic polarizability (B) electronic polarizability (C) dipolar polarizability (D) ionic and dipola...
Considering the BCS theory of superconductors, which one of the following statements is NOT CORRECT? (h is the Planck's constant and e is the electronic charge)...
Three non-interacting bosonic particles of mass m each, are in a one- dimensional infinite potential well of width a. The energy of the third excited state of the system is xx him?...
A linear charged particle accelerator is driven by an alternating voltage source operating at 10 MHz. Assume that it is used to accelerate electrons. After a few drift-tubes, the e...
At T = 0 K, which of the following diagram represents the occupation probability P(E) of energy states of electrons in a BCS type superconductor? (A) (B) (C) (D) P(E) E EF 1 P(E) E...
The temperature T dependence of magnetic susceptibility 𝜒 (Column I) of certain magnetic materials (Column II) are given below. Which of the following option is/are correct? Colum...
A material behaves as a superconductor below a critical temperature Tc and as a normal conductor above Tc. A magnetic field B⃗ = Bẑ is applied when T > Tc. The material is then co...
Which of the following option(s) is/are correct for a Type I superconductor?...
Consider a metal-superconductor junction connected to a dc voltage V. At T < Tc, where Tc is the superconductor's transition temperature, the current I versus V behavior of this ju...