9 Official GATE PH Questions with Verified Solutions & Answer Keys
The strangeness quantum number is conserved in (A) strong, weak and electromagnetic interactions. (B) weak and electromagnetic interactions only. (C) strong and weak interactions o...
The half-life of a radio-isotope is $4 \times 10^4$ years. If there are $10^9$ radioactive nuclei in a sample initially, the number of nuclei remaining undecayed after $8 \times 10...
Consider the process − + − ++ → +π π µµ . The minimum kinetic energy of the muons (µ) in the centre of mass frame required to produce the pion ( π) pairs at rest is __________ MeV....
In the nuclear reaction 13C6 +Ve → 13N, + X , the particle X is (A) an electron (B) an anti-electron (C) a muon (D) a pion...
The spin $ and orbital angular momentum I of an atom precess about j, the total angular momentum. / precesses about an axis fixed by a magnetic field Bj = 2B,2, where Bo is a const...
The Ξ0∗ particle is a member of the Baryon decuplet with isospin state | I, I3〉 = | 1 2 , 1 2〉 and strangeness quantum number -2. In the quark model, which one of the following is ...
In a hadronic interaction, 𝜋0's are produced with different momenta, and they immediately decay into two photons with an opening angle 𝜃 between them. Assuming that all these dec...
Decays of mesons and baryons can be categorized as weak, strong and electromagnetic decays depending upon the interactions involved in the processes. Which of the following option ...
Given Q is the electromagnetic charge and S is the strangeness quantum number, identify the particle(s) for which (Q - S) = 0 is satisfied....