Frequently Asked Questions
What is a Resistor?
Resistor is an electrical component that causes resistance in the passage of electricity. They may be found in practically all electrical networks and electronic circuits. Resistance is expressed in ohms (). When a current of one ampere (A) runs through resistor with a one volt (V) drop between its terminals, the resistance is measured in ohms. The voltage across the terminal ends determines the current. Ohm's law represents this proportion:R=V.I.
What are Examples of Resistors?
Resistors are used in practically every electrical component that we come across in our daily lives. They enable only a certain quantity of current to run through the electrical equipment, or only the amount that is wanted. As a result, they guarantee that the gadgets work properly. Let's look at some real-world resistor instances, such as Blower Motor Resistor, Dividing Voltage, Fan Speed Controller, Filter Circuits, Fusible Resistors, Heating Appliances and Lighting, In-Circuit Functioning, Laptop and Mobile Chargers, LEDs & Transistors Protection, Lighting Circuits in Houses, Measuring Electrical Current, Street Lighting, Temperature Control, Temperature Sensor, Timing Circuits.
What are the 4 Types of Resistors?
Resistors come in a variety of shapes and sizes, depending on their features and applications. Let's look at some of the primary categories that resistors fall into 6 resistor types.
1.Fixed Resistors
2.Magneto Resistors
3.Photoresistors
4.Thermistors
5.Variable Resistors
6.Varistors
Why Do We Need Resistor?
The primary function of resistor in an electronic circuit is to confine current to a safe level so that the accompanying advanced elements may work effectively.
It may be difficult to construct an electrical circuit without the use of resistors. Resistor's primary job is to oppose the passage of current through it, and the intensity of this opposition is measured in resistance. Sir G.S. Ohms, a German scientist, discovered a clear link between voltage, current, and resistance. A potential difference (V) across resistor (R) is proportional to the instantaneous current (I) flowing through it, according to him, and is given as:
V=R.I
R stands for the proportionality constant and is also known as resistor's resistance.
How are Resistor Made?
The voltage going through a circuit is stepped down using resistors. It's a rather straightforward gadget. Resistor's core is constructed of a substance like carbon, which is only a partial conductor of electricity. Resistor's main function is to lower the voltage of an electric current. The voltage is lowered or stepped down when it reaches the section of resistor that is a poor conductor.
The most common variety is a carbon resistor. Wrapping a carbon track around a ceramic core produces this. A machine winds the carbon track around the ceramic core, or a laser etching device etch the core. Two copper metal leads are then placed into resistor's ends, bringing the track's ends into contact with the leads. The core of resistor is then painted to seal it.
A metal film resistor is constructed in a similar manner. Ceramic is used to make the core of this resistor. This component, like other resistors, is manufactured by machine. The track of a metal film resistor is formed of a metal oxide substance. This is comparable to carbon in that it exhibits semi-conductive characteristics. A press machine is used to insert copper leads into the ends of resistor once again. To complete the product, these resistors are also painted.
Machines are used to make almost all resistors. The ceramic core is machine-molded and pressed. Individual cores are produced to accommodate various resistor sizes. The cores are then "wire wrapped" by wrapping resistor material around the core using another machine. The lead ends are then placed into the core, which include both the metal wire and a cap end styled like a bottle cap. The cores are either painted or have a baked-on finish.
Applying the resistance values to the unit is the final stage in producing a resistor. This is accomplished by drawing lines along resistor's painted core. Each line has a unique numeric value that corresponds to Ohms. For example, black equals zero, brown equals one, red equals two, and orange equals three. Simple numbers appear on the first two lines, while the multiplier appears on the third. As a result, a resistor with brown, red, and orange bands would have a resistance of 12,000 Ohms. As a result, resistor has a resistance of 12,000 Ohms.
How to Make a Homemade Resistor?
You can go to https://www.youtube.com/watch?v=YZlJtXlv6tE . This YouTube video shows you how to make a resistor at home(simple and variable homemade resistor) with some simple items. All items you need to make homemade resistors are:
1. A ruler (any size will do)
2. A bold pencil
3. A digital multimeter with resistor scale
4. A blank sheet of paper
Is a Light Bulb Resistor?
While a light bulb is not a typical resistor, it does behave like one. Resistor is a component that restricts electron flow. When electrons pass through resistor, they encounter resistance and a significant portion of their energy is converted into other types of energy, such as heat.
This notion also applies to a light bulb. Energy is turned into heat and light as electricity goes through the filament of a light bulb (which is simply resistor).
Do Resistors Consume Power?
Yes, resistors do consume power. Because resistor acts as a load across the battery, current flows. Power (not current) is used by resistor, and this power is equal to the product of the voltage across resistor times the current flowing. The equation I = V/R is used to calculate the current flow.
Is a battery resistor?
Is it true that batteries are resistors? A battery is a voltage source that works in real life. A battery may be viewed as a perfect voltage source with a tiny resistor in series (known as internal resistance). The emf minus the voltage drop across the internal resistance equals the terminal voltage (current of the external circuit times the internal resistance.) The current across both resistors is the same when two resistors are linked in series. The voltage from the battery is divided between the two resistors. Kirchoff's law states that the sum of the voltages across the two resistors must match the battery voltage.
