ByPARTHIBAN.N

Static electricityElectrostaticTurboelectric seriesElectrically chargeRubNegative chargePositive chargeProtonElectron

NeutralCombHairAttract RepulseNeutron

A stationary electrical charge that is built up on the surface of a material

OR

Imbalance of Positive and Negative charges

+

–

Proton (positive charge)

neutron (neutral)

electron (negative charge)+

+

+

–

––

atom nucleus

Only electrons may be lost or gained

The object If the atom loses electrons, it will become +.If the atom gains electrons,

it will become –

Rubbing materials does NOT create electric charges. It just transfers electrons from one material to the other.

When a balloon rubs a piece of wool...

– electrons are pulled from the wool to the balloon.

The balloon has more electrons than usual.

+++

++

–––––

The balloon : – chargedThe wool : + charged

wool

+

Some Cartoon which show’s formation of STATC ELECTRICITY

Causes of static electricityContact-induced charge separation

Turboelectric effectPressure-induced charge separation

Piezoelectric effectHeat-induced charge separation

Pyroelectric effectCharge-induced charge separation

Electrostatic induction

Static build-up in flowing flammable and ignitable materials

The flowing movement of finely powdered substances or through mechanical agitation can build up static electricity.

Dust clouds of finely powdered substances can become combustible or explosive.The ability of a fluid to retain an electrostatic charge depends on its electrical conductivity. When low conductivity fluids flow through pipelines or are mechanically agitated, contact-induced charge separation called flow electrification occurs.

Fluids that have low electrical conductivity (below 50 pico siemens/m), are called accumulators.

Fluids having conductivities above 50 pico siemens/m are called non-accumulators

"Static Electricity" means "High Voltage"

"STATIC ELECTRICITY" is not unmoving, it really means "HIGH VOLTAGE ELECTRICITY."

Static electricity is high voltage?.....

High voltage has all the characteristics of "static electricity."

STATIC ELECTRICITY is HIGH VOLTAGE at low current.

WHAT'S THE DIFFERENCE BETWEEN“STATIC” AND “CURRENT” ELECTRCITY How are "Static" and "Current" different?

THERE ARE TWO KINDS OF ELECTRICITY, STATIC ELECTRICITY AND CURRENT ELECTRICITY. STATIC ELECTRICITY IS ELECTRICITY AT REST, WHILE CURRENT ELECTRICITY IS ELECTRICITY IN MOTION."

"Static" Electricity “ versus "Current" Electricity

Static dischargeLightningLightning is a dramatic natural

example of static discharge

The static charge in air typically breaks down in this way at around 10,000 volts/centimeter (30 kV/cm) depending on humidity

The discharge superheats the surrounding air causing the bright flash, and produces a shock wave causing the clicking sound.The flash occurs because the air in the discharge channel is heated to such a high temperature that it emits light by incandescence.The clap of thunder result of the shock wave created as the superheated air expands explosively

Removal and prevention of static electricity

ANTISTATIC AGENT

1. Humidifier

2. Air Ionizers

ANTISTATIC DEVICE

Antistatic Bag Antistatic Strap

When a + charged rod is put near neutral object,

______________ is induced on the side of the object

near the rod and _____________ is induced on the side

away from the rod. The rod can attract the netural object

because _________ between rod and – induced charge >

the ________ between rod and + induced charge.

How does a positively charged rod attract a neutral object?

When a + charged rod is put near neutral object,

______________ is induced on the side of the object

near the rod and _____________ is induced on the side

away from the rod. The rod can attract the netural object

because _________ between rod and – induced charge >

the ________ between rod and + induced charge.

How does a positively charged rod attract a neutral object?

negative charge

positive charge

attraction

repulsion