Éléktrostatika: Béda antarrépisi
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{{electromagnetism3|estat=true}}
'''Eléktrostatika'''
{{tarjamahkeun|Inggris}}
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:<math>\vec{\nabla}\times\vec{E} = 0.</math>
From [[Faraday's law of induction|Faraday's law]], this assumption implies the absence or
:<math>{\partial\vec{B}\over\partial t} = 0.</math>
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===The electric field===
The [[electric field]] (in units of [[volt]]s per meter) is defined as the force (in [[newton]]s) per unit charge (in [[coulomb]]s). From this definition and Coulomb's law, it follows that the magnitude of the electric field ''E''
:<math>\vec{E} = \frac{Q}{4\pi\varepsilon_0 r^2}\hat{r}.</math>
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==Electrostatic generators==
{{utama|Electrostatic generator}}
The presence of [[surface charge]] imbalance
Note that the presence of [[electric current]] does not detract from the electrostatic forces nor from the sparking, from the [[corona discharge]], or other phenomena. Both phenomena can exist
:See also: ''[[Influence machine|Friction machine]]s'', ''[[Wimshurst machine]]s'', and ''[[Van de Graaf generator]]s''.
==Charge neutralization==
Natural electrostatic phenomena are most familiar as an occasional annoyance in
==Charge induction==
Charge induction occurs when a negatively charged object repels electrons from the surface of a second object. This
=='Static' electricity==
{{utama|Static electricity}}
Before the
Static electricity is usually caused when certain materials are rubbed against
A static shock occurs when the surface of the second material, negatively charged with electrons, touches a positively-charged conductor. Or Vice-Versa.
Static electricity is commonly used in [[xerography]], [[air filter]]s, and some automotive paints.
Static electricity is a build up of electric charges on two objects that have become separated from
Small electrical components can
=== Static electricity and chemical industry ===
when different materials are brought together and then separated, an accumulation of electric charge can occur which
A similar charging mechanism can occur within low conductivity fluids flowing through pipelines - a process called flow electrification. Fluids which have low electrical conductivity (below 50 pico siemens/cm, where pico siemens/cm is a
An important concept for insulating fluids is the static relaxation time. This is similar to the time constant (tau) within an [[RC circuit]]. For insulating materials, it is the ratio of the static [[dielectric constant]] divided by the electrical conductivity of the material. For hydrocarbon fluids, this is sometimes approximated by dividing the number 18 by the electrical conductivity of the fluid. Thus a fluid that has an electrical conductivity of 1 pico siemens /cm will have an estimated relaxation time of about 18 seconds. The excess charge within a fluid will be almost completely dissipated after 4 to 5 times the relaxation time, or 90 seconds for the fluid in the above example.
Charge generation
Bonding and
'''Applicable Standards'''
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*[http://www.zeusinc.com/pdf/Zeus_Static.pdf Static Electricity and Plastics]
*"[http://wolfsonelectrostatics.com/news/news-item12.asp Can shocks from static electricity damage your health?]". Wolfson Electrostatics News pages.
*"[http://aspden.org/arp/2005arp3.pdf Can Gravity be an Electrostatic Force?]" A Quantum
invisible wall of static: [http://amasci.com/weird/unusual/e-wall.html]
*"[http://www.puls.com.tr/default_eg.aspx What is static electricity | Static Problems]
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