1. The minimum value of hfe of a transistor used in RC phase shift oscillator is





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MCQ->The minimum value of hfe of a transistor used in RC phase shift oscillator is....
MCQ-> Read the following information carefully and answer the questions given below:P, Q, R, S, T, V and Z are seven employees of call centre. They work in three shifts-I, II and III, There is at least one and not more than three among them in any of these shifts. Each of them get one day off in every week from Monday to Sunday. Q works with only T in shift II and his weekly off is immediate to the next day of the off day of P, S has weekly off on Sunday and he is not in the same shift with either R or Q. P is in shift I with R whose off day is immediate after Q and immediately before T. V’s off day is immediately after T but not on Saturday. The employees having off day on Friday works in shift III and that on a Saturday does not work with TZ does not work either in shift II or in shift III.In which shift do three of them work ?
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MCQ-> The English alphabet is divided into five groups. Each group starts with the vowel and the consonants immediately following that vowel and the consonants immediately following that vowel are included in that group. Thus, the letters A, B, C, D will be in the first group, the letters E, F, G, H will be in the second group and so on. The value of the first group is fixed as 10, the second group as 20 and so on. The value of the last group is fixed as 50. In a group, the value of each letter will be the value of that group. To calculate the value of a word, you should give the same value of each of the letters as the value of the group to which a particular letter belongs and then add all the letters of the word: If all the letters in the word belong to one group only, then the value of that word will be equal to the product of the number of letters in the word and the value of the group to which the letters belong. However, if the letters of the words belong to different groups, then first write the value of all the letters. The value of the word would be equal to the sum of the value of the first letter and double the sum of the values of the remaining letters.For Example : The value of word ‘CAB’ will be equal to 10 + 10 + 10 = 30, because all the three letters (the first letter and the remaining two) belong to the first group and so the value of each letter is 10. The value of letter BUT = $$10 + 2 \times 40 + 2 \times 50 = 190$$ because the value of first letter B is 10, the value of T = 2 $$\times$$ 40 (T belongs to the fourth group) and the value of U = 2 $$\times$$ 50 (U belongs to the fifth group). Now calculate the value of each word given in questions 161 to 165 :AGE
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MCQ->It is desired to design a phase shift oscillator using an FET having a gm = 5000 μSiemen, rd = 40 kΩ and feedback circuit value of R = 10 K. Then value of C for oscillator operation at 1 kHz and that of RD for A = 40 to ensure oscillator action are....
MCQ->Match the following: List I (Oscillator) List II (Features) A.Wien Bridge1.RF oscillator, uses two inductors and one capacitorB.Colpitt's2.LC oscillator for radio frequencies uses three capacitances and one inductanceC.Hartley3.RC oscillator for audio frequenciesD.Clapp4.RF oscillator, uses two capacitances and one inductance

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