00:01
Here in this question we have given diameter of solenoid equals to 4 cm also we have time interval to complete one oscillation equals to 50 multiply by 10 to the power minus 9 second here the given figure shows a long solenoid with a diameter of 4 cm in a vacuum and a lithium nucleus in a clockwise circular orbit inside the solonite.
01:02
So here in part e of this cushion in outward magnetic field created by counter clock inter -cloak -wise current in the solenoid.
02:00
If the magnetic field is in the thumb direction, then the current flows in the direction.
02:52
Of curling fingers.
03:03
Now comes to part b of this question.
03:05
So here the lithium nucleus contains three protons.
03:09
So the charge of the lithium is given by q equals to 3 multiply by p which can be written as q equals to 3 multiply by 1 .6 multiply by 10 to the power minus 19 column.
03:24
Now, so we get q equals to 3 multiply by 1 .6 multiply by 10 to the power minus 90 cologne.
03:38
Now here the mass of the lithium nucleus is given by m equals to 3 multiplied by m of p plus 4 multiply by m of n.
03:57
Or here we can write this as m equals to 7 multiply by m of b now here we know that the expression for the centripetal force is given by f of c equals to m multiply by v squared divided by r where m is the mass of a lithium b is the velocity of a lithium and r are is the radius of circular path.
04:34
But here we also know that the centripetal force is equals to magnetic force in this case...