Circuits and Resonance Questions and Answers
Practice ModeShowing 10 of 50 questions
Q11
The gain of an inverting op-amp is given by:
Answer: Option B
Explanation: Gain = -Rf/Rin for inverting configuration
Q12
In a common emitter amplifier, the phase shift between input and output is:
Answer: Option C
Explanation: Common emitter provides 180 degree phase shift (inversion)
Q13
What is the main function of a zener diode?
Answer: Option C
Explanation: Zener diodes are used for voltage regulation in reverse breakdown
Q14
The time constant for an RL circuit is:
Answer: Option B
Explanation: τ = L/R for RL circuits
Q15
In a full-wave bridge rectifier, how many diodes conduct during each half cycle?
Answer: Option B
Explanation: Two diodes conduct simultaneously in a bridge rectifier
Q16
What is the typical value of β for a common transistor?
Answer: Option B
Explanation: β values typically range from 50 to 200 for most transistors
Q17
The knee voltage for a germanium diode is approximately:
Answer: Option B
Explanation: Germanium diodes have about 0.3V knee voltage
Q18
In a series resonant circuit, at frequencies below resonance, the circuit behaves as:
Answer: Option A
Explanation: Below resonance, capacitive reactance dominates
Q19
What is the purpose of a bypass capacitor in amplifier circuits?
Answer: Option B
Explanation: Bypass capacitors provide AC ground for emitter resistor
Q20
The unit of mutual inductance is:
Answer: Option B
Explanation: Mutual inductance is measured in Henry (H)