Answer:
Magnetic field will be equal to 0.269 T
Step-by-step explanation:
We have given mass of chlorine ion is 35u
As we know that 1 u =

Radius of circular path is given r = 3.5 m
So mass of chlorine ion

Charge

Potential difference V = 250 KV
From conservation of energy

So


We know that radius is equal to

So

