Question

Which of the following particles has a negative charge?



neutrino

positron

gamma ray

all of the above

none of the above

Answer 1

gamma ray

Answer 2

I think it's the positron.
http://en.wikipedia.org/wiki/Positron

Answer 3

Positron is the antiparticle of the electron, hence has opposite the charge, in this case it's positive. Gamma Ray and Neutrino have no charge. Hence none have a negative charge.