Question

Full solution

Answer 1

 (a) Given, A = 400 cm² = 400 X 10^-4 m² 

d = 1 mm = 10^-3 m 

t = 0.5 mm = 5 X 10^-4 m 

V = 100 Volts 

K = 5 

Case 1 : 

Capacity of capacitor before inserting the dielectric slab between the plates :