Light emitting diode will emit light when one circuit 20 milliampere. Over the next while, an app project and potential difference between the street pole 1.7 volts if the diode is connected to this battery, 6 Volt that has very little internal resistance. Will need to make, how much value resistor connected in circuit with diode in order not to become corrupted. How to make a. If the diode per app project with 6 strings Dubai V electric current through a diode, so mA more than 20 steam diode is damaged. Need to find the resistance activity. Suppose R is resistance, diode to breakdown with serial per potential difference, voltage between polarities and currents are determined by the values from the image. , V_r displaystyle is the potential difference between the ends of the resistors. V_D displaystyle is the potential difference between the diode = 1.7 V. V is the potential difference between the battery terminals = 6.0 V. Displaystyle = V_R + V will be V_D. Replace the value of displaystyle = V_r + V 6.0 V 1.7. displaystyle V_R = 4.3 V Consider the displaystyle = Ir resistors V_R Replace the value of displaystyle 4.3 V = 20x10 ^ {-3} x A R. Will be R = 215 displaystyle Omega? The answer must be resistance, ohm serial connected with 215 diode.
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