Author Question: State three reasons for adding a dielectric material between the plates of a capacitor. What will ... (Read 74 times)

Bob-Dole · **on:** Jul 29, 2018

State three reasons for adding a dielectric material between the plates of a capacitor.

What will be an ideal response?

Question 2

A factory siren indicating the end of a shift has a frequency of 90.0 Hz.

(a) What frequency is perceived by the occupant of a car traveling towards the factory at 25 m/s?
(b) What frequency is perceived by the occupant of a car traveling away from the factory at 30 m/s?

stillxalice · **Reply #1 on:** Jul 29, 2018

Answer to Question 1

(1 ) Dielectrics do not break down (allowing electric charge to flow) as readily as air, so a higher voltage can be applied without charge passing across the gap.
(2 ) A dielectric allows the plates to be placed closer together without touching thus allowing an increased capacitance because the plate separation is less.
(3 ) If a dielectric fills the space between the two conductors, it increases the capacitance.

Answer to Question 2

(a) 97 Hz
(b) 73 Hz