Question

Please reply with explanations then I will be greatful to you.

Answer 1

Explanation:

may be it's correct option c

Answer 2

Answer:

(iv)

Explanation:

Capacitance between the parallel plates of the capacitor, C = 3 μF

Initially, distance between the parallel plates was d and it was filled with air. Dielectric constant of air, k = 1.

Capacitance, C, is given by the formula,

C = ∈₀A/d    ---- (1)

Dielectric constant = 4.0

Hence, capacitance of the capacitor becomes

C' = k ∈₀A/d

   = 4 C {From (1)}    ------ (2)

Taking ratios of equations (1) and (2), we obtain,

C' = 6C

   = 6 * 3

   = 12 μF

The capacitance between the plates is 12 μF.

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