Varicap objective questions and answers

16. Varicap is a

   A.Forward biased diode

   B.Reverse biased diode

   C.Both (a) and (b)

   D.None of the above

17. Varicaps are used

   A.In parametric amplifiers

   B.For generation of FM signal

   C.In electronic tuned circuits

   D.All of the above

18. When bias applied to a varicap diode in increased capacitance

   A.Is increased

   B.Is decreased

   C.Remains constant

   D.First increases and then decreases

19. At microwave frequencies, the varactor is not useful for

   A.Amplifiers

   B.Frequency multiplication

   C.Oscillators

   D.Electronic tuning

20. The varactor is widely used in

   A.FM receivers

   B.TV receivers

   C.Communication equipment

   D.All of the above

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