Time Traveler for resistor The first known use of resistor was in See more words from the same year. Statistics for resistor Look-up Popularity. Style: MLA. English Language Learners Definition of resistor. More from Merriam-Webster on resistor Britannica. Get Word of the Day daily email! Test Your Vocabulary. Test your knowledge - and maybe learn something along the way.
Love words? Need even more definitions? Just between us: it's complicated. In fact the resistor is probably the most common type of electronic component used in electrical and electronic circuits. There is a large number of different types of resistor that can be bought and used. The properties of these different resistors vary, and it helps to obtain the right type of resistor for any given design to ensure that the best performance is obtained.
Although many resistors will work in a variety of applications the type of resistor can be important in some cases. Accordingly it is necessary to know about the different resistor types, and in which applications each type of resistor can be used. Resistors are used in virtually all electronic circuits and many electrical ones.
Resistors, as their name indicates resist the flow of electricity, and this function is key to the operation most circuits. Resistance is one of the key factors used in electricla and electronic circuits. Resistance is the proprty of materials to resist the flow of electricity, and it is governed by Ohm's Law. Read more about Resistance. There are two main circuit symbols used for resistors.
The oldest one is still widely used in North America and consists of a jagged line representing the wire used in a resistor. The other resistor circuit symbol is a small rectangle, and this is often termed the international resistor symbol and it is more widely used in Europe and Asia.
The Omega sign is often omitted and the decimal point replaced by the multipler: e. In the rest of this article, we will refer to static resistors as just resistors. Left: ohm American style resistor. Right: ohm international standard resistor. Current can be thought of like water flowing through a pipe. Resistance would be how easy it is for that water to flow.
A resistor works by restricting the flow of current, it can do this in one of three ways: firstly, by using a less conductive material, secondly by making the conductive material thinner and finally by making the conductive material longer.
Wire-wound resistors are more precise and stable than carbon-film resistors, the resistance of the resistor is controlled by the number of turns and thickness of the wire. There are many types of resistors but they all function on the same three principles as this is the only reliable way to control the resistance of the resistors.
A carbon film resistor with most of its protective casing taken off. You can clearly see the carbon spiral that gives the resistor its resistance. A resistor limits current and drops the voltage. Simple, but very useful. In a very simple and standard example seen below:.
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