Changing the dielectric of two charged parallel plates of a capacitor from vacuum to mica will produce what effect on the capacitor
a. it will increase the charge
b. it will decrease the charge
c. it will increase the capacitance
d. it will decrease the capacitance.

option (c)

Explanation:

The formula for the parallel plate capacitance is given by

C = ∈o A / d

Where, A be the area of plates and d be the distance between the plates.

if a dielectric between the plates

Then the capacitance becomes C' = K ∈o A / d

Where, K be the dielectric constant of mica.

As we know that the value of K is more than 1 so the capacitance C is more than C.

So, capacitance will increase.

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .

i think the answer would be b