A coil of wire with a current flowing thru it becomes a magnet
Answer:
A.
Explanation: both triple by 3
Answer: E = 
Explanation: The formulae for intensity of an electric field of a solid metal sphere relative to a point is given below
r
where
,
, r = 0.1m r = is the position vector of the charge.
it has been stated in the question that the charge is placed at the center thus it has no position vector.

3.87 i think but if its not correct then let me know.