A semiconductor has an electron concentration of per and a hole concentration of per . The electron mobility is 25000 and the hole mobility is 100 . Then,
1. the semiconductor is n-type
Three identical capacitors A, B and C are charged to the same potential and then made to discharge through three resistance . Their potential differences (V) are plotted against time t, giving the curves 1, 2 and 3. Choose the incorrect option.
1.
2.
3.
4. None of the above.
The logic circuit as shown below has the input waveforms A and B as shown. Pick out the correct output waveform.
1.
2.
3.
4.