66th B.P.S.C. (Pre) (Re-Exam) 2020
Which particle is free of charge?
a$\alpha$-particle
bElectron
cNeutron✓ Correct
dProton
eNone of the above/More than one of the above
Explanation
A neutron is an electrically neutral subatomic particle. The mass of a neutron is nearly equal to that of a proton. The neutron was discovered in 1932 by scientist James Chadwick.
general-science