Answer:
Both Thomson and Rutherford used charged particles in their experiments.
Explanation:
your answer is.....
D. have a large atomic radius
although they also increase going from left to right so if D is incorrect, B might be your answer. it depends on context of the lesson.
Given :
Current, I = 3.75 A .
Magnetic Field, 
To Find :
The distance from the wire.
Solution :
We know,

Hence, this is the required solution.