(sub) - (sub) equations:
- S = Apparent Power in VA
- V = Voltage in Volts V
- I = Current in Amps A
- R = Resistor in ohms
- P = Real Power in Kilowatts kw
- P = Real Power in Watts
- E = Energy In Kilowatt-hours Kwh
- E = Energy In Electron-volts eV
- T = Time in Seconds sec
- Q = Elementary Charge e
- Q = Energy In Joules J
- Q = Battery Capacity in Milliamp-hours mAh
- Q = Coulombs Charge C
- Cosθ = Power factor in AC circuits
- VL-L = Line to Line Voltage in 3-Phase Circuits
- VL-N = Line to Neutral Voltage in 3-Phase Circuits
Where:
Mathematical Definition:
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Mathematical Definition 2:
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Mathematical Definition 3:
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Mathematical Definition 4:
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Mathematical Definition 4:
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Mathematical Definition:
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Mathematical Definition 2:
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Mathematical Definition 3:
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Mathematical Definition 4:
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using the sub calculator.
To use the above "sub Conversion Calculator" follow the below steps:
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sub conversion application
- S = Apparent Power in VA
- V = Voltage in Volts V
- I = Current in Amps A
- R = Resistor in ohms
- P = Real Power in Kilowatts kw
- P = Real Power in Watts
- E = Energy In Kilowatt-hours Kwh
- E = Energy In Electron-volts eV
- T = Time in Seconds sec
- Q = Elementary Charge e
- Q = Energy In Joules J
- Q = Battery Capacity in Milliamp-hours mAh
- Q = Coulombs Charge C
- Cosθ = Power factor in AC circuits
- VL-L = Line to Line Voltage in 3-Phase Circuits
- VL-N = Line to Neutral Voltage in 3-Phase Circuits
Where:
Frequently Asked Questions - Resistor Wattage Conversion FAQs:
How do you determine the wattage of a resistor?
A resistor's wattage describes how much power it can safely handle before it overheats. It is decided according to the requirements of the application, not calculated. You find power by using P = V²/R or P = I²R, and you have to get a resistor with enough wattage to cover twice the power estimate to maintain safety and strength.
What is the formula to calculate resistor power?
Voltage across a resistor is P = V²/R, whereas current through the resistor is P = I²R (resistor power). Apply Ohm's Law to discover missing quantities, if that is necessary. Power should be expressed in watts (W), resistance in ohms (Ω), voltage in volts (V), and current in amps (A).
How do I know if my resistor watt rating is enough?
Examine the power dissipation you can anticipate from the resistor, which is calculated as P = I²R or P = V²/R. After, check how much power the resistor can accept by looking at its maximum wattage. If the actual wattage is similar to the model rating, use a model with more watts (like 1W instead of 0.25W) to stop overheating or the device from failing.
How many watts can a 100 ohm resistor handle?
The size and design of a 100-ohm resistor influence what watt rating it can have. The ratings for standard resistors are 1/8W, 1/4W, 1/2W, 1W, and 2W. Resistance in Ohms (100Ω) is not what determines the wattage; the manufacturer sets that. The information on the resistor’s datasheet or markings should always be looked at.
Can I use any resistor wattage for a circuit?
No. If a resistor is not rated high enough for the current, it may start to overheat or catch fire. Always use P = V²/R or I²R to arrive at the expected power, then pick a resistor with double its power value. Bigger and bulkier units are chosen for safer operation of circuits using high power.