Resistor Calculator Amperage

This is the correct value. The formula for calculating the output voltage is based on ohms law and is shown below.

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The calculator gives 056 w as the equivalent resistance of a 5 w 10 w 2 w and 1 w resistor in parallel.

Resistor calculator amperage. The formula tells us that we are using 02 watts of power and the resistor should be larger then that to survive the heat. The current i in amps a is equal to the square root of the power p in watts w divided by the resistance r in ohms w. Ohms law can be rewritten in three ways for calculating current resistance and voltage.

The voltage v in volts v is equal to the current i in amps a times the resistance r in ohms w. The voltage v in volts v is equal to the current i in amps a times the resistance r in ohms w. So in our case a 14 watt 025 might be on the small size but a 12 05 watt resistor should be fine.

Adding other resistors in parallel will only decrease the resistance so its not possible that the equivalent resistance is more than 1. If a current i should flow through a resistor r the voltage v can be calculated. Ohms law calculator voltage v current i resistance r power p voltage v current i enter any two known values and press calculate to solve for the others.

I can be calculated. P w v v i a ac ohms law formula. V v i a r w the power p in watts w is equal to the voltage v in volts v times the current i in amps a.

First version of the voltage formula. You have 1 ohm resistor. More online conversion calculators at digi key.

The resistor color code calculator decodes and identifies a value and tolerance of 4 band wire wound resistors. This calculator is based on the ohms law calculator but takes into consideration the voltage drop from the led. If there is a voltage v across a resistor r a current i flows through it.

V i r. To calculate the resistor needed for a simple led circuit simply take the voltage drop away from the source voltage then apply ohms law. The voltage v in volts v is equal to the power p in watts w divided by the current i in amps a.

Voltage divider calculator a voltage divider circuit is a very common circuit that takes a higher voltage and converts it to a lower one by using a pair of resistors. Typical sizes for small resistors are 18 watt 14 watt 12 watt 1 watt and so on.

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