Which is bigger 1C or charge on the proton?

An electron and a proton are detected in a cosmic ray experiment, the first with kinetic energy 10 keV, and the second with 100 keV. Which is faster, the electron or the proton? QBtain the ratio of their speeds, (electron mass = 9.11 xx10^31 kg, proton mass = 1.67 x 10-^27 kg, 1 eV = 1.60 x 10-^9 J)

A proton enters a magnetic field of flux density 1.5Wb/m^2 with a speed of 2×10^7 m/s at angle of 30^o with the field. Find the force on the proton .

Which property of colloidal suspension is used to determine the nature of charge on the particles?

Name the force which is experienced by moving charged particle in the magnetic field.

Two copper spheres of same radii, one hollow and the other solid, are charged to the same potential. Which, if any, of the two would hold more charge ?

Three electric point charges q_0,q_1 and q_2 are at distances vect r_0,vec r_1 and vec r_2 respectively with respect to same origin. What is the force on charge q_0 in the filed of charges q_1 and q_2 ?

A conducting sphere of radius 10cm has unknown charge. If the electric field at 20cm from the centre of the sphere is 1.5 * 10^3NC^-1 and points radially inward, what is the net charge of the sphere?

Calculate the magnitute of electrostatic force between a proton and an electron separated by a distance 0.5.A Give that magnitude of charge of proton and electron to be 1.6xx10^(-19) C each