# What is a resistor and how does it work?

Have you ever heard about what is a resistor, the simple answer to this question is that it is a passive electrical component that causes obstruction in the floor of electric current. This constraint is called electric current and this component is called a resistor.

When you have to know about electricity, then you must have found that all materials mainly fall under two basic categories, they are conductors and insulators. Where conductors allow electricity to flow through them, in the same way, electricity does not pass through insulators.

The scientific reason for this is that the resistance level in the conductor is not equal, whereas in the insulator it is very high. Resistance in this means to create an obstruction, which is such a thing that allows electricity without any hindrance. The greater the resistance means the more hindrance.

They are some such devices that also precisely control this resistance in electrical resistors. If you want to know more about these resistors and how they work, what are their types, then you should read this article. So let’s start without delay.

## What is a resistor?

A resistor is a passive electrical component that creates resistance on the floor of electric current. Resistance is measured in ohms.ohm is the resistance that occurs when a current of one ampere passes through one of the resistors which have 1 drop across both terminals. This current is always proportional to the voltage across its two terminal ends. This ratio is called ohms law.

### Resistor definition and symbol

A resistor is a passive electrical component whose primary function is to limit the flow of electric current. At the same time is ANSI standard is very common, which is only zig Zag line.

### Types of resistor

Resistors can be divided into many types which include everything from construction type to a resistance material. Let’s see.

• Potentiometer
• Rheostat
• Trimpot

Resistors have a lot of applications, whether it is from digital electronics at the expense of precision components or for physical quantities in measurement devices. Let us know more about some important applications of their resistors.

### Resistors in series and parallel

In electronic circuits, resistors are often used. A circuit designer may obtain a specific resistance value to combine some resistors.

### Measures electric current

Electric current is calculated, over the voltage drop off a precision resistor, where the corresponding value is already known together with the circuit connected in series. This current is calculated using ohms law. Usually, it is a high precision manganin resistor which has a low resistance value.

### Resistors used in LED

LED lights require a specific current to operate in all ways. LED light-up will not only happen due to high current, while high current will cause device burn. So they are fitted in series with resistors. These resistors are called ballast resistors and they passively regulate the current in the entire circuit.

Read this Also: What is Backup and Top 5 Types of backup?

### Blower motor resistor

In cars, the air ventilation system is actuated through a fan which is driven by a blower motor. A special resistor is used to control the resistor.