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Electronics Engineering Objective Questions { Operational Amplifier and Its Applications  }



113.  At series pr parallel resonance, the circuit behaves as a ____ load.
A. capacitive
B. resistive
C. inductive
D. none of the above
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114. At series resonance, voltage across L is ___ voltage across C.
A. equal to but opposite in phase to
B. equal to but in phase with
C. greater than but in phase with
D. less than but in phase with
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115. When either L or C is increased, the ____ resonant frequency of LC circuit
A. remains the same
B. increases
C. decreases
D. insufficient data
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116. At parallel resonance, the net reactive component of circuit current is
A. capacitive
B. zero CR
C. inductive
D. none of the above
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117. In a parallel LC circuit, if the input signal frequency is increased above resonant frequency, then
A. XL increases and Xc decreases
B. XL decreases and Xc increases
C. both X and Xc increase
D. both XL and Xc decrease
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118. The Q of an LC circuit is given by
A.27cfrxR
B. 2n fr L
C.27c frL
D.27c f L
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119. 1f Q of an LC circuit increases, then bandwidth
A. increases
B. decreases
C. remain the same
D. insufficient data
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