Plz solve this question.

Question

Answer is 3.

Answer 1

Option 3 is correct

Explanation

Given that the charge on left plate of  10uF capacitor is -30uC. So its right plate will have +30uC charge.This charge will be distributed  between two plates of 6uF and 4uF connected in parallel combination. So +30uC charge will be distributed in the ratio of the capcitcapaces of 6uF and 4uF capacitors.

Hence the charge on left plate of 6uF capacitor will be +30×6/(6+4) uC = +18uC.

And its right plate will acquire charge of -18uC.

Comments

Why will it be negative? I did not get that.

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It is due to induction through nonconducting dielectric medium in the capacitor.