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Question: Answered & Verified by Expert
A particle having almost zero mass and exactly zero charge is
PhysicsNuclear PhysicsJEE Main
Options:
  • A positron
  • B electron
  • C neutron
  • D neutrino
Solution:
1922 Upvotes Verified Answer
The correct answer is: neutrino
We know that the neutrino is the particle which has almost zero mass and exactly zero charge. Positron has the charge $+e$ and mass $m_{e}$ [equal to electron mass].
Electron is a particle which has $-e$ charge and $9.1 \times 10^{-31}$ kg mass.
Neutron is a particle which has zero charge and $1838 \mathrm{~m}_{e}$ mass.
So, the required answer is neutrino.

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