A capacitor becomes a perfect insulator is

A capacitor becomes a perfect insulator for

A capacitor becomes a perfect insulator when the current is

A capacitor behaves like a perfect conductor for high frequency AC. Explain why.

A capacitor behaves like a perfect condcutor for high frequency a.c. Explain, why?

Find the smallest number by which 180 must be multiplied so that it becomes a perfect square. Also find the square root of the perfect square so obtained.

By which least number should 5000 be divided so that it becomes a perfect square ?