How do you determine the wattage rating of a resistor?
In a parallel connection of resistors, the voltage across each resistor is the same.
- Find the voltage (V) across resistor R1 of power rating P1 using the formula: V = √(P1 × R1).
- Calculate the power dissipated by the second resistor (R2), P2 = V2/R2.
- The overall voltage is 14.14 V, so the resulting power equals 20 W.
How is wattage rating calculated?
Steps
- The number of watts is equal to amps multiplied by volts. That’s it!
- For example, if the current is 3 amps (3A) and the voltage is 110V, you multiply 3 by 110, to get 330W (watts). The formula is P=3A X 110V = 330 W (with P standing for power).
- This is why watts are sometimes called volt-amps.
How do you determine the color code of a resistor?
Reading and Determining the Resistor Value Hold the resistor with the gold or silver band to the right and read the color codes from the left to the right. Select the color codes from the bands on the resistor. Read the colors from left to right. The resistance value based on the color code provided is now displayed.
What is power rating of resistor?
The Resistor Power Rating is sometimes called the Resistors Wattage Rating and is defined as the amount of heat that a resistive element can dissipate for an indefinite period of time without degrading its performance.
How do you solve a resistor?
To calculate the total overall resistance of a number of resistors connected in this way you add up the individual resistances. This is done using the following formula: Rtotal = R1 + R2 +R3 and so on. Example: To calculate the total resistance for these three resistors in series.
What is wattage rating?
[′wäd·ij ‚rād·iŋ] (electricity) A rating expressing the maximum power that a device can safely handle continuously.
What is power rating formula?
Calculate power rating in KVA when you know voltage and output resistance. Use the formula: P(KVA) = (V^2/R)/1000 where R is resistance in ohms. For example, if V is 120 volts and R is 50 ohms, P(KVA) = V^2/R/1000 = (14400/50)/1000 = 288/1000 = 0.288 KVA.
How do you calculate a resistor?
Understand parallel circuits. Imagine a wire leaving one end of a battery,then splitting into two separate wires.
What are resistor color codes?
What are resistor color codes? Resistor color codes are color bands or numerical codes wrapped around resistors so that their properties such as power rating, value, tolerance, and reliability of a resistor. Below are tips to know when reading the codes of resistors: The reading direction is not always clear.
What is resistor and how to read resistor color code?
RED: 2
What is color coding resistor?
Resistor Color-coding. Color-coding is a method used to indicate the resistive value, tolerance, and temperature coefficient of resistors with low wattage rating because of their small size. Color bands are used because they can be easily and cheaply printed on a small electronic component.