# What is the value of the resistor?

A resistor is a device that opposes the flow of electrical current. The bigger the value of a resistor the more it opposes the current flow. The value of a resistor is given in ohms and is often referred to as its ‘resistance’.

People also ask, what is the tolerance value of a resistor?

Tolerance is the percentage of error in the resistor’s resistance, or how much more or less you can expect a resistor’s actual measured resistance to be from its stated resistance. A gold tolerance band is 5% tolerance, silver is 10%, and no band at all would mean a 20% tolerance.

How you can read the value of a resistor?

Steps

• Position the resistor with the gold or silver color band to the right..
• Read the color sequence that must be decoded to determine resistance.
• Determine the coded number for the resistive value.
• Determine the tolerance of the resistor.
• Determine the decoded number for the resistive value.
• How are resistor values measured?

The electrical resistance of a resistor is measured in ohms. The symbol for an ohm is the greek capital-omega: Ω. The (somewhat roundabout) definition of 1Ω is the resistance between two points where 1 volt (1V) of applied potential energy will push 1 ampere (1A) of current.

## How the resistors are made?

Resistor composition. Resistors can be constructed out of a variety of materials. Most common, modern resistors are made out of either a carbon, metal, or metal-oxide film. In these resistors, a thin film of conductive (though still resistive) material is wrapped in a helix around and covered by an insulating material.

## What is the color code for a 4.7 K resistor?

4k7 / 4.7k ohm Resistor Colour CodeValue4.7 kΩ / 4700 ΩType4 Band Colour CodeColour CodeYellow, Violet, Red, GoldMultiplierRed, 100ToleranceGold Band ±5%

## Why are standard resistors made up of manganin?

The standard resistance coils are made of manganin. This is because 1. the variation of resistivity with temperature is very small and 2. the resistivity of manganin is very high and any desired resistance can be made with convenient dimensions of the material.

## What is the color code for a 220 ohm resistor?

220R / 220 ohm Resistor Colour CodeValue220 ΩType4 Band Colour Code SystemColour CodeRed, Red, Brown, GoldMultiplierBrown, 10ToleranceGold Band ±5%

## What is the color code for a 10 ohm resistor?

10R / 10 ohm Resistor Colour CodeValue10 ΩType4 Band Colour CodeColour CodeBrown, Black, Black, GoldMultiplierBlack, 1ToleranceGold Band ±5%

## Where are resistors used?

A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses.

## Do resistors have a polarity?

If I understand your question, then yes – resistors are reversible, in the sense that they can be connected to the circuit in either direction. Resistors are not like diodes or capacitors. They do not have a polarity. The conduct (or resist) current equally in both directions of current flow.

## What is the purpose of a resistor in a circuit?

The main function of resistors in a circuit is to control the flow of current to other components. Take an LED (light) for example. If too much current flows through an LED it is destroyed. So a resistor is used to limit the current.

## What is resistor and its use?

A resistor is an electrical component that limits or regulates the flow of electrical current in an electronic circuit. Resistors can also be used to provide a specific voltage for an active device such as a transistor.

## What is the function of a resistor in a circuit?

The main function of resistors in a circuit is to control the flow of current to other components. Take an LED (light) for example. If too much current flows through an LED it is destroyed. So a resistor is used to limit the current.

## Is a light bulb a type of resistor?

The reason a light bulb glows is that electricity is forced through tungsten, which is a resistor. The energy is released as light and heat. A conductor is the opposite of a resistor. Electricity travels easily and efficiently through a conductor, with almost no other energy released as it passes.

## What is a 1k ohm resistor?

The value of the resistance is expressed as a number of ohms (the symbol Ω is used for ”ohm”). In this lesson, we work this out for a 1k Ω resistor where ”k” is the abbreviation for the prefix ”kilo”, meaning 1000. So, a 1k Ω resistor has a value of 1000 ohms and the number we will code is 1000.

## How does a variable resistor control voltage?

A rheostat (variable resistor) controls the current in a circuit, and so can vary the brightness of a bulb or the speed of a motor. The gradient of a voltage-current graph gives the resistance of a component. The resistance can also be calculated by dividing the change in voltage by the change in current.

## What is the formula for current?

The resistance R in ohms (Ω) is equal to the voltage V in volts (V) divided by the current I in amps (A): Since the current is set by the values of the voltage and resistance, the Ohm’s law formula can show that: If we increase the voltage, the current will increase.

## What a capacitor is made of?

The conductive plates of a capacitor are generally made of a metal foil or a metal film allowing for the flow of electrons and charge, but the dielectric material used is always an insulator.

## What is meant by the tolerance of a resistor?

“Tolerance is the percentage of error in the resistor’s resistance, or how much more or less you can expect a resistor’s actual measured resistance to be from its stated resistance. A gold tolerance band is 5%tolerance, silver is 10%, and no band at all would mean a 20% tolerance.” Source: Resistor Color Codes.

## What is the meaning of the resistance?

Resistance is the opposition that a substance offers to the flow of electric current. When an electric current of one ampere passes through a component across which a potential difference (voltage) of one volt exists, then the resistance of that component is one ohm.

## How does a resistor work?

Devices called resistors let us introduce precisely controlled amounts of resistance into electrical circuits. Photo: Four typical resistors sitting side by side in an electronic circuit. A resistor works by converting electrical energy into heat, which is dissipated into the air.

## What is the total equivalent resistance of the circuit?

More resistance means less current is flowing through the circuit. Equivalent resistance is a different way of indicating ‘total’ resistance, which we calculate differently for series and parallel circuits. In a series circuit, the different components are connected in a single, continuous loop.

Categories FAQ