Home
Class 12
PHYSICS
Find the capacitance of a capacitor, if ...

Find the capacitance of a capacitor, if it is made up of 120 sheets of paraffined paper 0.1 mm thick, interspaced with aluminium foil sheets of `5 cm xx 3` cm dimensions.
In what range of voltages can such a capacitor work?

Text Solution

Verified by Experts

The aluminium foil sheets are connected alternately to form a system of capacitors connected in parallel (Fig. 25.3). The number of capacitors is equal to the number of dielectric layers.
The breakdown voltage is `U_(bn)=E_(m)d`, so the working voltage is chosen to be 1/3 to 1/2 of this
Promotional Banner

Similar Questions

Explore conceptually related problems

The capacitance of a capacitor made by a thin metal foil is 2muF . If the foil is filled with paperr of thickness 0.15 mm, dielectric constant of paper is 2.5 and width of the paper is 400 mm. what is the length of foil?

Calculate the capacitance of a parallel-plate capacitor having 20 cm xx 20 cm square plates deparated by a distance of 1.0 mm.

Find the number of envelopes that can be made out of a sheet of paper 384 cm by 168 cm, if each envelope requires a piece of paper of size 16 cm by 12 cm.

Calculate the capacitance of a parallel plate condenser of two plates 100cm xx 100cm each separated by 2mm thick glass sheet of K = 4.

A sheet of aluminium foil of negligible thickness is placed between the plates of a capacitor of capacitance C as shown in the figure then capacitance of capacitor becomes