If you are given a voltage, increasing resistance makes current go down. If you are given a current, increasing resistance makes voltage go up. Originally Answered: How do resistors affect voltage and current?
What Colour is a 470 ohm resistor?
470 Ohm 0.5W Carbon Film Resistor (CFR) with ±5% Tolerance. 470 Ohm Resistor Color Code: Yellow, Violet, Brown, Golden.
What happens if I use a higher ohm resistor?
When we replace a resistor with a higher value of resistor, the current in the circuit will decrease by an amount depending upon the value of the new resistor. Where E = voltage in the battery/cell and r = internal resistance of the circuit.
What is the use of ohm resistor?
Zero ohm resistors are often used as jumpers to enable various circuit options because they can easily be added or omitted. They can also be used as crossovers where one trace has to cross over another trace. There are also very low resistance resistors with precise values that are used for measuring current.
What does a 470 ohm resistor look like?
So for 470-ohm resistor, 1st digit is ' 4 ', ∴ look for color in a chart with value 4, then it's your 1st color(say yellow). The next 2nd digit is ' 7 ', ∴ look for color in a chart with value 7, then it's your 2nd color (say violet). For Silver, its values is 10%, and Brown indicates 1% tolerance.
What are the 3 Colour bands of a 470 ohm resistor?
Band Value
---------- -----
1st Yellow 4
2nd Violet 7
3rd Brown 10
4th Gold 5%
What does a 470 ohm resistor do?
A passive device that resists the flow of electricity. This resistor will provide 470 Ohms of resistance wherever it is placed and will handle 1/4 watts. Use these low value resistors for voltage dividers and where you need to keep the current flow as high as possible.
What is the Colour code of a carbon resistor having a resistance of 470 ohm and a tolerance of 5%?
The colors of a resistance of 470 Ω ± 5% is Yellow, Violet, Brown, Gold.18 Jul 2020
How do I know what Ohm my resistor is?
Some resistors have contact plates on the bottom. Read the 3 or 4 numbers on the resistor. The first 2 or 3 represent the significant digits and the last indicates the number of 0s that should follow. For example, a resistor reading 1252 indicates a rating of 12,500 ohms or 1.25 kilo-ohms.
What does a 100ohm resistor look like?
The color code for the four bands 100 Ohm resistor is brown, black, brown, gold. 4-band 100 ohm resistor color code is calculated as: 1st-band= Brown= 1 (1st digit) 2nd-band= Black= 0 (2nd digit).8 Sept 2021
How do you determine the size of a resistor?
The physical size of the resistor is directly related to how much wattage it can accomodate. The larger the resistor the more wattage, or the more power it can dissipate. The amount of heat dissipated per unit time is measured in watts.
What is the difference between 1/4 Watt and 1/2 watt resistors?
The quarter watt resistor has about one half the surface area of the half watt part so it can only radiate half the heat. Normally you design the circuit to have the power dissipation of the resistor to be around one half its rated power to avoid damage to the resistor.
What is the size of a 1/4 watt resistor?
The most common through-hole resistors come in an axial package. The size of an axial resistor is relative to its power rating. A common ½W resistor measures about 9.2mm across, while a smaller ¼W resistor is about 6.3mm long. A half-watt (½W) resistor (above) sized up to a quarter-watt (¼W).