00:01
In this portion, the kinetic energy of proton is given as 1 .5 mega electron volts.
00:10
The proton is moving in the circular path.
00:15
Let's suppose this is the mass of the proton and this is moving with the speed b.
00:20
This is the radius.
00:22
So you know that the centipotal forces are acting and these are moving in the uniform magnetic field.
00:29
Uniform magnetic field that is b.
00:33
So magnetic force qbb is equal to mb squared divided by r.
00:39
So q times speed r is equal to mass time speed.
00:44
So speed is equal to qbr divided by mass.
00:48
This is the expression of speed.
00:51
And what is kinetic energy? kinetic energy is half mass times speed square.
00:58
So kinetic energy is half.
00:59
Mass speed expression we are putting in this question so kinetic energy is equal to half this is q square b square r squared divided by this is m so magnetic field and radius are uniform constant so it means kinetic energy is directly proportional to charge a square and inversely proportional to the mass...