Analog Circuits objective questions with answers part2

Q1. When XC = XL the circuit:
(A) applied voltage is zero
(B) is at resonance
(C) draws maximum current
(D) draws minimum current

Q2. Removing bypass capacitor across the emitter-leg resistor in a CE amplifier causes
(A) decrease in voltage gain
(B) decrease in current gain
(C) increase in voltage gain
(D) increase in current gain

Q3. In a bistable multivibrator circuit, commutating capacitor is used
(A) to provide ac coupling
(B) to reduce gain
(C) to increase the base storage charge
(D) to increase the speed of response

Q4. An oscillator of the LC type that has a split capacitor in the circuit is
(A) Weinbridge oscillator
(B) Colpitts oscillator
(C) Hartly oscillator
(D) RC phase shift oscillator

Q5. The upper cutoff frequency of an RC coupled amplifier mainly depends upon
(A) Coupling Capacitor
(B) bypass capacitor
(C) Output capacitance
(D) Inter electrode capacitance and stray shunt capacitance

Q6. In a series RLC circuit, which value may always be used as a vector reference?
(A) voltage
(B) current
(C) resistance
(D) reactance

Q7. A voltage amplifier amplifies signal voltage. Similarly, a power amplifier
(A) converts the dc power into useful ac power
(B) amplifies power
(C) amplifies signal current
(D) converts the signal ac power into the dc power

Q8. The lowest output impedance is obtained in case of BJT amplifiers for
(A) CB configuration
(B) CE configuration
(C) CC configuration
(D) CB with RE configuration

Q9. In a parallel RLC circuit, which value may always be used as a vector reference?
(A) voltage
(B) current
(C) resistance
(D) reactance

Q10. The type of power amplifier which exhibits crossover distortion in its output is
(A) Class A
(B) Class B
(C) Class C
(D) Class AB

Q11. A differential amplifier, amplifies
(A) the average of the voltages on the two input lines
(B) the sum of the two input waveform
(C) difference of voltages between the two input lines
(D) None of these

Q12. When considering the reactance of a series RLC circuit:
(A) Resistance is always dominant.
(B) Capacitive reactance is always dominant
(C) Inductive reactance is always dominant
(D) The larger of the two reactances is dominant.

Q13. Current in a series RLC circuit may always be used as:
(A) leading vector
(B) reference
(C) angle
(D) lagging vector

Q14. If the bandwidth of a filter increases:
(A) Q decreases
(B) the half-power frequency decreases
(C) the center frequency decreases
(D) the roll-off rate increases

Q15. The voltage measured across the two series reactive components at resonant frequency is?
(A) Reactive voltage
(B) zero
(C) Applied voltage
(D) inductive

Q16. When only the low frequencies are allowed to pass to the output, the filter is known as:
(A) low-pass filter
(B) high-pass filter
(C) bandpass filter
(D) band-stop filter

Q17. When a full band of frequencies is allowed to pass through a filter circuit to the output, the resonant circuit is called a:
(A) low-pass filter
(B) high-pass filter
(C) bandpass filter
(D) band-stop filter

Q18. The function of bleeder resistor in a power supply is
(A) to increase the output dc voltage
(B) to ensure a minimum current drain in the circuit
(C) the same as that of load resistor
(D) to increase the output current

Q19. A 6 kHz sinusoidal voltage is applied to a series RC circuit. The frequency of the voltage across the resistor is
(A) 0 Hz
(B) 6 kHz
(C) 12 kHz
(D) 17.2 kHz

Q20. When a parallel circuit resonates it is said to:
(A) flywheel
(B) oscillate
(C) both of the above
(D) None of these