The diagram of figure 2 shows a bi-directional opto coupler, Electrical Engineering

The diagram of figure 2 shows a bi-directional opto coupler

The diagram of FIGURE 2 shows a bi-directional opto coupler input interface circuit. When a supply voltage of 20 V is applied the LED carries a current and 2 V is dropped across it. Calculate the value of the LED current and the value of current through the 3kΩ resistance.

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Electrical Engineering: The diagram of figure 2 shows a bi-directional opto coupler

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Electrical Engineering: The diagram of figure 2 shows a bi-directional opto coupler

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