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ECE Objective Questions { Operational Amplifier and Its Applications }

78. In an LC circuit, when the capacitor energy is maximum, the inductor energy is must use
A. minimum
B. maximum
C. half-way between maximum and minimum
D. none of the above

79. In an LC oscillator, the frequency of oscillator is ____ L or C.
A. proportional to square
B. directly proportional to
C. independent of the values of
D. inversely proportional to square root of

80.  An oscillator produces ____ oscillations.
A. damped
B. undamped
C. modulated
D. none of the above

81. An oscillator employs _____ feedback.
A. positive
B. negative
C. neither positive nor negative
D. data insufficient

82. An LC oscillator cannot be used to produce _____ frequencies.
A. high
B. audio
C. very low
D. very high

83. Hartley oscillator is commonly used in
A. radio receivers
B. radio transmitters
C. TV receivers
D. none of the above

84.  In a phase shift oscillator, we use ____ RC sections.
A. two
B. three
C. four
D. none of the above

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