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Resistors and semi-conductors. As electrons travel through these less conductive substances they collide with more atoms, typically converting some of their energy to heat and light. Consider a common light bulb - the tungsten filament is a simple resistor - the tungsten atoms partially block the electrons traveling through, converting their energy to light and some heat.
Wiki User
∙ 15y ago
Wiki User
∙ 12y agoResistance is affected by the resistivity of the material, the length of the material, and the cross-sectional area of the material. The formula used is this:
R=(resistivity*length)/(area)
Wiki User
∙ 6y agoWhen electrons flow, they collide with with IONs which causes kind of obstruction, which is known as resistance
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What is resistance expressed in?
Electrical resistance is measured in Ohms.
What is excessive electrical resistance?
High resistance means insulation
Is high electrical resistance good or bad?
electrical resistance is when something resists the electrical current .. eg rubber hope it helped
What are most commonly caused by current flowing through high resistance due to faulty wiring igniting insulation and other material?
what is most commonly caused bt current flowing through high resistance due to faulty wiring igniting insulation and other materials
What symbol is often used for electrical resistance?
I have never come across a symbol for an electrical resistance box. As the resistance box is a test instrument and it would not be drawn on any electrical schematic there may not be a symbol designated for it. The last letter of the Greek alphabet is (Ω omega) and it is used for the electrical symbol for resistance.
What measures electrical resistance?
an ohm meter OR multimeter is used to measure the electrical resistance...
What is the opposition to the flow of electrons is called?
Resistance, or electrical resistanceResistance, or electrical resistanceResistance, or electrical resistanceResistance, or electrical resistance
Who when and how was electrical resistance discovered?
electrical resistance was discovered by Georg Ohm in the late 1820's.
What is resistance expressed in?
Electrical resistance is measured in Ohms.
What is excessive electrical resistance?
High resistance means insulation
What type of resistance do conductors have?
Conductors have a (low) Electrical resistance.
What is the name of an instrument used to vary electrical resistance?
Rheostat is the name of an instrument used to vary electrical resistance.
What is the electrical resistance of dirt?
I believe from Carson's equations that the electrical resistance of dirt isrd = 0.09530 Ohms / mile
What checks should be done to an electrical measuring device before attempting to measure electrical resistance?
Some of the checks that can be done to an electrical device before checking electrical resistance include the proximity of other magnetic fields and other electrical circuits. Measure electrical resistance while at a safe distance from strong electrical circuits.
Compared to thin wires electrical resistance in thick wires are?
The electrical resistance in thick wires is less than thin.
Who is ohm?
Ohm is the SI unit of electrical impedance (AC) or the electrical resistance (DC), named after Georg Ohm. Not Ohms!
What is an obstruction of electrical flow?
Resistance.
