Question
- Write the functions of the three segments of a transistor.
- The figure shows the input waveforms A and B for ‘AND’ gate. Draw the output waveform and write the truth table for this logic gate.


Base: Controls the flow of majority carriers from the emitter to the collector.
Collector: It collects the majority carriers from the base/majority of those emitted by the emitter.

| Truth Table | ||
| A | B | Y |
| 0 | 0 | 0 |
| 0 | 1 | 0 |
| 1 | 0 | 0 |
| 1 | 1 | 1 |
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OR
Calculate the energy released in MeV in the following nuclear reaction. $^{238}_{92}\text{U}\ \rightarrow\ ^{234}_{90}\text{Th}\ +\ ^4_2\text{He}\ +\ \text{Q}$ Given Atomic mass of 238U = 238.05079u Atomic mass of 234Th = 234.04363u Atomic mass of alpha particle = 4.00260u 1u = 931.5MeV/ c2 IS the decay spontaneous? Give reason.