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Oscillators – 1 – 2

6. The main advantage of a crystal oscillator is that its output is :

(a) 50Hz to 60Hz
(b) variable frequency
(c) a constant frequency
(d) direct current

Answer
Answer : (c)

Explanation
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7. An oscillator of the LC type that has a split capacitor in the circuit is :

(a) hartley oscillator
(b) colpitts oscillator
(c) wein bridge oscillator
(d) R-C phase shift oscillator

Answer
Answer : (b)

Explanation
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8. Wein bridge oscillator can typically generate frequencies in the range of :

(a) 1KHz – 1MHz
(b) 1 MHz – 10MHz
(c) 10MHz – 100MHz
(d) 100MHz – 150MHz

Answer
Answer : (a)

Explanation
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9. The frequency of oscillation of a tunnel-collector oscillator having L= 30 µH and C = 300 pf is nearby :

(a) 267 kHz
(b) 1677 kHz
(c) 1.68 kHz
(d) 2.67 MHz

Answer
Answer : (b)

Explanation
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10. Which of the following is the most stable oscillator ?

(a) Wein bridge oscillator
(b) Hearley-oscillator
(c) Colpilts oscillator
(d) Crystal controlled oscillator

Answer
Answer : (d)

Explanation
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