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limit current and avoid having it explode

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Q: Why you need resistance in series with led?
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Where should a resistor be placed when using an LED?

In series with the LED. The value would be whatever it takes to obtain the required voltage and current across the LED. As an example, if you had an LED that required 25ma at 2v, and you wanted to use a 9v battery, you would need a resistance of 280 ohms. (This is (9-2) / 0.025, a simple application of Ohm's law.)


Four 50 ohms are connected in series calculate the current in the circuit?

The series resistance is 4 x 50 = 200 Ohms. You would need additional information to get the current; usually this is calculated from the voltage. current = voltage / resistance.The series resistance is 4 x 50 = 200 Ohms. You would need additional information to get the current; usually this is calculated from the voltage. current = voltage / resistance.The series resistance is 4 x 50 = 200 Ohms. You would need additional information to get the current; usually this is calculated from the voltage. current = voltage / resistance.The series resistance is 4 x 50 = 200 Ohms. You would need additional information to get the current; usually this is calculated from the voltage. current = voltage / resistance.


What happens in a series circuit if the resistance is halved?

If you add a second resistor, the resistance of series circuit will increase.


How is the total resistance in a series circuit is determined?

The total resistance in a series circuit is determined by adding (summing) the individual resistances of each component in the circuit.


What is the combined resistance of a 39k and a 47k resistor connected in series?

86k. Resistance in series is the sum of the individual resistors.

Related questions

What is the total resistance of twelve 5.6 ohms resistors in a row?

If they are in series, you need to add the resistance values.


Where should a resistor be placed when using an LED?

In series with the LED. The value would be whatever it takes to obtain the required voltage and current across the LED. As an example, if you had an LED that required 25ma at 2v, and you wanted to use a 9v battery, you would need a resistance of 280 ohms. (This is (9-2) / 0.025, a simple application of Ohm's law.)


Four 50 ohms are connected in series calculate the current in the circuit?

The series resistance is 4 x 50 = 200 Ohms. You would need additional information to get the current; usually this is calculated from the voltage. current = voltage / resistance.The series resistance is 4 x 50 = 200 Ohms. You would need additional information to get the current; usually this is calculated from the voltage. current = voltage / resistance.The series resistance is 4 x 50 = 200 Ohms. You would need additional information to get the current; usually this is calculated from the voltage. current = voltage / resistance.The series resistance is 4 x 50 = 200 Ohms. You would need additional information to get the current; usually this is calculated from the voltage. current = voltage / resistance.


How do you calculate the joint resistance in a series circuit with three resistances?

The resistance of a series circuit is simply the sum of the individual resistors.


How has crop dusting led to pesticide resistance?

The act of crop dusting itself has not led to pesticide resistance. Mismanagement of pesticide application is the root cause of pesticide resistance.


Who led the red river resistance?

i did


What happens in a series circuit if the resistance is halved?

If you add a second resistor, the resistance of series circuit will increase.


Where is the most resistance lost in a series circuit?

Resistance isn't lost. The largest voltage drop will occur across the largest resistance in a series circuit.


When 10 ohm resistance and 100 mega ohm resistance are connected in series then what will be their conbined resistance?

The net effective resistance of resistors in series is the sum of the individuals.Combined resistance = (100,000,000) + (10) = 100,000,010Ωhms.


What is the formula to find out the total resistace of the series parellel circuit?

i think first one should find out the series resistance that is R1+R2+R3 and after that parellel resistance that is 1/R1+1/R2+1/R3 and after that add the series resistance and parellel resistance to get the total resistance


Calculate the current in a series of four 50ohms bulbs?

The series resistance is 4 x 50 = 200 Ohms. You would need additional information to get the current; usually this is calculated from the voltage. current = voltage / resistance. mistybabe r19 :DD


How is the total resistance in a series circuit is determined?

The total resistance in a series circuit is determined by adding (summing) the individual resistances of each component in the circuit.