How to make an electrical quiz board with separate bulbs for right and wrong answers?

jack007: How to make an electrical quiz board with separate bulbs for right and wrong answers?
I do know how to make an electrical quiz board with just one bulb. But now I have to make one in which the red bulb glows for the wrong answer and the green for the right. Can anyone plsssssssss show me how to make one. Thx in advance

Answers and Views:

Answer by s s
you could use a two way switch at the output I am assuming ur using logic gates
you could have an invertor connected to to the output and before the red diode.

Answer by Harsh
refer to physics tb of 9 th std or 10 th std in electricity chapter for answer…..

Answer by goober
Since you know how to make an electrical quiz board with just one bulb, make it with the green bulb and then use a red bulb the same way for all the incorrect answer choices.

Answer by sparky_dy
(assuming the probe is in the positive side)

Get as many diodes as you have wrong answers (1N4007 is a suitable type for this application). A diode is an electrical non-return valve which will only let as current flow through it in one direction. Connect the anode (unmarked end) of a diode to each of the “wrong” answer terminals. Join all the cathodes (marked ends) together, and connect this junction to the “wrong answer” bulb.

Now whenever the probe is connected to any “wrong answer” terminal, current will flow through one of the diodes and the red bulb.