Charge of a proton is -1.6*10^-19C

Q. The magnitude of charge of a single electron or proton is $1.6\times {10}^{-19}C$. What is the net charge of a particle that has $20$ electrons and $22$ protons?

Q. The de-Broglie wavelength of a proton $(charge=1.6\times {10}^{-19}C,mass=1.6\times {10}^{-27}kg)$ accelerated through a potential difference of $1kV$ is :

Q. A proton is moving perpendicular to a uniform magnetic field of $2.5$ tesla with $2MeV$ kinetic energy. The force on proton is ________N. (Mass of proton $==1.6\times {10}^{-27}kg$. Charge of proton $=1.6\times {10}^{-19}C$

Q. The intensity of electric field required to balance a proton of mass $1.7\times {10}^{-27}kg$ and charge $1.6\times {10}^{-19}C$ is nearly.