Question

Question 9 A 25.4 uf capacitor has 79 ma of current flowing through it with a frequency of H. the frequency is cut in hall without change the vol what happens to the Increases by 4x Decreases by 4 No change. Decreases by 2 Increases by 2

Answer 1

Ans . Capacitance of a capacitor does not depend upon the frequency , as it is given by

For a parallel plate capacitor , C = kE_{​​​​​​°}A /d

Where ,k = dielectric constant of medium between the plates

A= area of plates .

d = seperation between the plates

So it will remain same ,as it depends only upon the geometrical properties.

Option C is correct .

Ans . As resistor dissipates energy , so it will use power.

As , power dissipated across a resistor is given by

P= i^2 x R

As current is pulsating

so, power dissipated will also be pulsating.

Option C is correct .