# Electrical energy

```ELECTRICAL ENERGY
ELECTRICAL ENERGY
“ALSO CALLED ELECTRICITY”
2 KINDS OF ELECTRICAL CHARGE
1.NEGATIVE
2.POSITIVE
ELECTROMAGNETIC FORCE
- the force exerted by the magnetic field
created by electricity
ELECTROSTATIC FORCE
- force between two charges
kWh – refers to the total electrical energy that the
household consumed for one month.
Current (I)
- is the rate of flow of electricity.
Resistance (R)
- is an electrical quantity that measures how
the device or material reduces the electric current
flow through it.
- is measured in units of ohms (Ω).
Voltage
– the rate at which energy is drawn from a
source that produces a flow of electricity in a
circuit.
𝐼
𝑣
𝑅(Ω).
Example Problem:
A nine volt battery supplies power to a cordless curling iron with a
resistance of 18 ohms. How much current is flowing through the
curling iron?
A 110 volt wall outlet supplies power to a strobe light with
a resistance of 2200 ohms. How much current is flowing
through the strobe light?
Find the current I through a resistor of resistance R = 2 Ω if the
voltage across the resistor is 6 V.
```