The document discusses energy storage in capacitors. It defines a capacitor as a device that stores electric potential energy and electric charge by insulating two conductors from each other. The energy density of a capacitor is defined as the total energy per unit volume stored in the space between its plates. An example calculates the energy density of a capacitor with an electric field of 5 V/m. The electric field is created between the plates when a voltage is applied, allowing a charge difference to develop between the plates.

1. ENERGY STORED AND
ELECTRIC-FIELD ENERGY IN
CAPACITOR
Prepared by: RG Luis Vincent P.
Gonzaga

2. OBJECTIVES
Determine the energy density and the
electric field inside the capacitor with
the given configuration.

3. CAPACITOR
When you set an old-fashioned spring mousetrap or
pull back the string of an archer’s bow, you are
storing mechanical energy as elastic potential energy.
A capacitor is a device that stores electric potential
energy and electric charge.
To make a capacitor, just insulate two conductors
from each other.

5. Capacitors
in fact can be any
two conducting
objects insulated in
the middle

6. The SI unit of capacitance is called one farad (1
F), in honor of the 19th-century English
physicist Michael Faraday. one farad is equal
to one coulomb per volt
1 F = 1 farad = 1 C>V = 1 coulomb>volt

10. ENERGY DENSITY
Energy Density is defined as the total amount of energy in
a system per unit volume.
 It is denoted by letter U.
energy per unit volume stored in the space between the
plates of a parallel-plate capacitor.

12. EXAMPLE :
Find the energy density of a capacitor if its
electric field, E = 5 V/m.

13. Given;
E = 5V/m
We know that,
𝜖0 = 8.8541 × 10−12
𝐹/𝑚
The energy density formula of capacitor is given by

14. THE CAPACITORS ELECTRIC FIELD
When a voltage is
applied across the two
plates of a capacitor, a
concentrated field flux is
created between them,
allowing a significant
difference of free
electrons (a charge) to
develop between the two
plates:

15. THANK YOU..!

16. QUIZ
1. What do you call the distance between two plates of
capacitor?
2. Between those distance there is fields interacting, what
do you call that fields?
3. Battery uses chemical to store energy while capacitor
uses .

17. ANSWER
1. Potential difference
2. Electric field
3. Electric field