B. Amplitude
It is the maximum distance from the equilibrium point of the pendulum.
Answer:
Energy will be
Explanation:
We have given that dielectric constant k = 5
Area of the plate 
Distance between the plates 
Electric field E = 200 kN/C
We know that capacitance is given by 
We know that electric field is given by 
So 
So energy will be 
1kg = 1000000000 micrograms
I hope it helps you ;)