Electronic Devices and Circuits
How many free electrons does a p type semiconductor has?

Those produced by doping as well as thermal energy
Any of the above
Only those produced by doping
Only those produced by thermal energy

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Electronic Devices and Circuits
When diodes are connected in series to increase voltage rating the peak inverse voltage per junction

should not exceed the breakdown voltage
may be equal to or less than breakdown voltage
should not exceed one third the breakdown voltage
should not exceed half the breakdown voltage

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