Question

Question
2 points
In a parallel plate capacitor the separation between the plates is 3mm with air between them.
Now a Imm thick layer of a material of dielectric constant 2 is introduced between the plates
due to which the capacity increases. In order to bring its capacity to the original value the
separation between the plates must be made
(a) 1.5 mm
(b) 2.5 mm
(c) 3.5 mm
(d) 4.5 mm

Answer 1

Answer:

3.5mm

Explanation:

C= Aε/(d -t + t/k).......... {By Formula}

• ε/3 = εA/(d -1 + 1/2)
• 3 = d - 0.5
• d = 3.5mm