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
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
8. Wein bridge oscillator can typically generate frequencies in the range of :
(a) 1KHz – 1MHz
(b) 1 MHz – 10MHz
(c) 10MHz – 100MHz
(d) 100MHz ndash; 150MHz
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
10. Which of the following is the most stable oscillator ?
(a) Wein bridge oscillator
(b) Hearley-oscillator
(c) Colpilts oscillator
(d) Crystal controlled oscillator
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