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Electronics For You

I found a very simple electronics problem online and am posting it for your reference. Link to Problem



My solution :

Principle

1.A diode presents less impedance than a lamp.
2.Current follows the path of least resistance.
3.A diode can conduct only when forward biased.
4.If the frequency of the source is sufficiently high then the eye sees the flashing lights as a continuous source. (persistence of vision).
Answers

Applying 1,2,3,4.
1.Lamp L2 is ON.
2.Lamp L1 is ON.
3.Both appear to be ON.(though actually they alternate).

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