Question

unit of permittivity of free space

Answer 1

Up silent Knott =q sq/Fr sq
Its unit is Coulomb sq/N-msq
Op d is correct

Answer 2

answer is (4).
bcz F=kQq/r²
put the value of K=1/4x3.14xpermitivity of free space

solving this we get
permitivity's unit=C²/N-m²