# 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'.
A.

### 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.
• #### What are the colors of resistors?

Components and wires are coded with colors to identify their value and function. The colors brown, red, green, blue, and violet are used as tolerance codes on 5-band resistors only. All 5-band resistors use a colored tolerance band.
• #### What is the color code for a 10 ohm resistor?

10R / 10 ohm Resistor Colour Code
Value10 Ω
Type4 Band Colour Code
Colour CodeBrown, Black, Black, Gold
MultiplierBlack, 1
ToleranceGold Band ±5%
• #### Are electrical resistors directional?

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.
B.

### How you can read the value of a resistor?

Steps
1. Position the resistor with the gold or silver color band to the right..
2. Read the color sequence that must be decoded to determine resistance.
3. Determine the coded number for the resistive value.
4. Determine the tolerance of the resistor.
5. Determine the decoded number for the resistive value.
• #### How you can read the value of a resistor?

Steps
1. Position the resistor with the gold or silver color band to the right..
2. Read the color sequence that must be decoded to determine resistance.
3. Determine the coded number for the resistive value.
4. Determine the tolerance of the resistor.
5. Determine the decoded number for the resistive value.
• #### 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'.
• #### How do you check a resistor with a multimeter?

Steps
1. Remove power from the circuit containing the resistor.
2. Isolate the resistor from the circuit.
3. Inspect the resistor.
4. Read the resistor value visually.
5. Prepare a digital multimeter (DMM) to measure the resistor.
6. Measure the resistance.
7. Determine the actual resistance of the resistor.
C.

### 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.
• #### Why are resistors important?

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 20k ohms?

The range switch sets where the decimal place is located on the display. On the 200 ohm range, full scale will be 199.9 ohms. On the 2K scale, it is 1999 ohms. For 20K, 19.99 K, and 20 Meg, 19.99 meg.
• #### What is the measurement of resistance?

Electrical resistance is measured by either of two methods: constant current or constant voltage. The constant current technique sources a known current through an unknown resistance and the resulting voltage is measured. This technique is generally used for resistance values below 200M ohms.

Updated: 6th October 2019