Electricity in our day

In our day-to-day power word is not a stranger anymore. Many household appliances that use electricity, such as irons, radios, televisions, refrigerators, fans, electric sewing machine, magic jar, and a washing machine. This indicates that the electrical energy in our lives have become a staple. It is therefore important for us to learn about electricity. In physics, power is divided into two types, namely static and dynamic power. Static electricity studying the electrical properties of an object regardless of the movement or flow of electric charge.

1.      Static electricity

(elektrostatic) is a collection of large amounts of electric charge, the static (no flow), but in case of discharging the charge time is very short.

A. How Generates Electricity Charged Objects

Electrically charged object is an object that have excess or shortage of electrons. Some simple ways to create static electricity are:
1. Plastic ruler rubbed on dry hair will negatively electrically charged.
2. Glass that has been rubbed with fur would be positively charged.

B. Types of Electrostatic Discharge

In the atom consists of a nucleus and electrons. The nucleus consists of protons and neutrons, positively charged protons and uncharged neutrons (neutral). Atom is called neutral if the number of protons in the nucleus equals the number of electrons surrounding the nucleus. Positive atom is an atom that has more positive charge than negative charge.

C. Coulomb Law

Charles Augustin de Coulomb was the first to examine the relationship with the two charge electric force and the distance between them by using a torsion balance. In that study ultimately concludes Coulumb in a law called the law of Coulumb:  “large repulsion ataugaya attraction between two electrically charged objects, is directly proportional to the respective electric charge and inversely proportional to the square of the distance between the two charged objects.”

Mathematically, Coulomb's law can be formulated:

 F = k q1 q2
           r²

Description:
F = force of attraction or repulsion (Newton)
k = constant = 9 × 109 N m2 C-2
q1, q2 = charge of each object (Coulomb)
 r = distance between the two objects (meters)

D.   Static Electricity Utilization

Utilization of static electricity in everyday life include:
1. The antidote Lightning
2. Van de Graaff Generator
3. Tools smoke clotting
4. Painting a car
5. Photocopiers

2.      Dynamic Power

Dynamic power is the power that can move. how to measure the current strength in dynamic power is the electrical charge dibagai time with the unit and the electric charge is coulumb time unit is second. Strong currents in the circuit branches with Kuata incoming flow with strong currents coming out. while a series circuit current strength remains the same every obstacle edges. Rather different voltage resistance. a series circuit voltage depends on the resistance, but the branching circuit voltage has no effect on resistance. all that has been stated by Kirchhoff's law which states that "the number of strong electric currents that go together with the amount of electrical current coming out strong." Ohms law can be summed up how to measure voltage current × resistance is strong. Barriers value is always the same as the voltage is proportional to the current strength. voltage has units of volts (V) and the current strength is amperes (A) and resistance is ohm.

experiment :

1). Tools and Materials:

2 pieces of plastic ruler (try relatively new)
2 pieces of glass rods
1 piece of woolen cloth
1 piece of silk fabric
1 piece stative
 thread

2). procedure:

a. Hang a plastic ruler with a piece stative
thread, then rub one end of the ruler
aloud with woolen cloth.
b. A moment later, another ruler rub on one
ends violently with wool cloth, hold the end of the
The first ruler who had been scrubbed. Observe and record the results
on the data table.
c. In the same way, do to stem glass
rubbed with a silk cloth.
d. Now, rub back one end of a plastic ruler
has been suspended from the stative with woolen cloth, then
Rub one end of the glass rod with a silk cloth and
bring on the end of the ruler charged. observe and
record the results on the data table.

if we rub a glass rod or a ruler and a piece of plastic with cloth or amber will show the effects of static electricity. cause an object
electrically charged due to the rubbing and the object is said to have a charge
electricity. The electrical charge on the object affected by the constituent atoms
forming ions. Ionization process due to several things such as
induction, the influence of external energy either through friction, heating, etc.