Online quizes on different topics of physics and electronics
Java quiz on semiconductors

Java quiz on the pn diode

Java quiz on modulation

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Java quiz on the p-n diode © Abhijit Poddar

If you see the applet above, java is installed in your computer; if you don't, you need to download and install java runtime environment (jre) from Also do not forget to switch on your audio speakers, lest you miss hearing the sound of clapping when you make a correct choice!