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12th Standard English Medium Physics Subject Electronics and Communication Book Back 5 Mark Questions with Solution Part - I

12th Standard

    Reg.No. :
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Physics

Time : 01:00:00 Hrs
Total Marks : 25

    Part I

    5 x 5 = 25
  1. The current gain of a common emitter transistor circuit shown in figure is 120. Draw the DC load line and mark the Q point on it. (VBE to be ignored).

  2. Calculate the range of the variable capacitor that is to be used in a tuned-collector oscillator which has a fixed inductance of 150 μH. The frequency band is from 500 kHz to 1500 kHz.

  3. What is the output Y in the following circuit, when all the three inputs A, B, and C are first 0 and then 1?

  4. In the combination of the following gates, write the Boolean equation for output Y in terms of inputs A and B.

  5. Prove the Boolean identity AC + ABC = AC and give its circuit description.

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