The law which states that 'a variation in an electric field causes magnetic field', is

Step-by-step solution

Modified ampere circuital law is, ∮ B → · d L → = μ 0 i c + i d i d   is the displacement current that is, i d = ε 0 d ϕ E d t ⇒ ∮ B → · d L → = μ 0 i c + ε 0 d ϕ E d t Thus, it is clear from the above expression that modified ampere's law states that a variation in an electric field causes magnetic field.