Electronics (ECE) - MCQ Practice Questions
Practice free Electronics (ECE) multiple-choice questions with detailed answers and explanations. Perfect for competitive exam preparation.
400 questions | 100% Free
In a Common Source FET amplifier, the gain is primarily dependent on which parameter?
A BJT amplifier operates in the saturation region. What is the approximate output impedance?
The input impedance of a Common Emitter amplifier is approximately equal to:
In a differential amplifier, the Common Mode Rejection Ratio (CMRR) is 80 dB. What is the CMRR in linear form?
A voltage follower (Common Collector) amplifier has a voltage gain of:
In a BJT amplifier biased in the active region, what is the relationship between collector current and base current?
An op-amp integrator circuit has R = 10 kΩ and C = 100 nF. What is the time constant?
The gain-bandwidth product (GBW) of a typical general-purpose op-amp (like LM741) is approximately:
The input impedance of an op-amp in an ideal configuration is assumed to be:
In a Common Emitter BJT amplifier, if the collector resistance is increased while keeping other parameters constant, how does the voltage gain change?
A non-inverting amplifier is constructed with an op-amp having open-loop gain A₀ = 100,000. If Rf = 90 kΩ and Rin = 10 kΩ, what is the closed-loop voltage gain?
What is the primary advantage of a Darlington pair configuration in BJT amplifiers?
A BJT is operated in the saturation region. Which of the following statements is true?
In a two-stage cascaded amplifier, the first stage has gain A₁ = 50 and bandwidth BW₁ = 100 kHz, while the second stage has A₂ = 20 and BW₂ = 200 kHz. What is the overall voltage gain?
A voltage-controlled voltage source (VCVS) has transconductance gm = 50 mS. If the input voltage is 10 mV, what is the output current?
What is the typical input impedance of a voltage follower (unity gain buffer) using an ideal op-amp?
For maximum power transfer from a source with internal resistance Rs to load RL, what should be the condition?
What is the input offset voltage of a typical precision op-amp (like OP07)?
What is the slew rate of a standard 741 op-amp?
What is the gain-bandwidth product (GBW) of a typical 741 op-amp?