Question

Question 1.31: It is now believed that protons and neutrons (which constitute nuclei of ordinary matter) are themselves built out of more elementary units called quarks. A proton and a neutron consist of three quarks each. Two types of quarks, the so called ‘up’ quark (denoted by u) of charge (+2/3) e, and the ‘down’ quark (denoted by d) of charge (−1/3) e, together with electrons build up ordinary matter. (Quarks of other types have also been found which give rise to different unusual varieties of matter.) Suggest a possible quark composition of a proton and neutron.

Class 12 - Physics - Electric Charges And Fields Electric Charges And Fields Page-49

Answer 1

here given,
up quark , u = +2/3 e and
down quark , d = -1/3 e
charge of protons = +e = 2/3 e + 2/3 e - 1/3 e
[ charge on proton = 1.6 × 10^-19 C = +e , ]
so, we can say configuration of proton is 'uud'

similarly
charge of neutron = 0 = +2/3 e - 1/3 e -1/3 3
[ neutron is neutral subayomic particle. so, charge on neutron is zero.]
so, configuration of neutron is 'udd'

Answer 2

Answer:

hope you understood. hav a nice day