20 min Score: 0 Attempted: 0/20 Subscribe 1. An oscillator is a circuit that: (A) Converts DC to AC (B) Converts high-frequency signals to low-frequency signals (C) Filters AC signals (D) Generates continuous waveforms without an external signal input 2. The main function of an oscillator is to: (A) Generate a periodic waveform (B) Amplify … Read more
20 min Score: 0 Attempted: 0/20 Subscribe 1. The main purpose of an amplifier is to: (A) Convert AC to DC (B) Filter signals (C) Convert low frequencies to high frequencies (D) Amplify the amplitude of a signal 2. The amplifier class that has the highest efficiency is: (A) Class A (B) Class D (C) … Read more
Q#1: In an ideal operational amplifier, the open-loop gain is:(A) Zero(B) 1(C) Infinite(D) 1000Answer: (C) Infinite Q#2: The input impedance of an ideal operational amplifier is:(A) Zero(B) Low(C) Infinite(D) VariableAnswer: (C) Infinite Q#3: The output impedance of an ideal operational amplifier is:(A) Zero(B) Low(C) High(D) VariableAnswer: (A) Zero Q#4: The ideal op-amp should have an … Read more
Q#1: In an analog signal, the information is represented by:(A) Discrete values(B) Digital pulses(C) Continuous values(D) Binary dataAnswer: (C) Continuous values Q#2: Which of the following is the unit of current?(A) Volt(B) Ampere(C) Ohm(D) WattAnswer: (B) Ampere Q#3: The ideal voltage gain of an operational amplifier (op-amp) in an open-loop configuration is:(A) Zero(B) Infinite(C) 1(D) … Read more
20 min Score: 0 Attempted: 0/20 Subscribe 1. The primary function of a voltage regulator is to: (A) Maintain a constant output voltage regardless of input fluctuations (B) Convert AC to DC (C) Convert DC to AC (D) Increase the input voltage 2. A linear voltage regulator typically uses: (A) High frequency switching (B) A … Read more
20 min Score: 0 Attempted: 0/20 Subscribe 1. A half-wave rectifier allows current to pass through the load during: (A) The entire cycle of the input signal (B) The negative half-cycle of the input signal only (C) The positive half-cycle of the input signal only (D) Both the positive and negative half-cycles of the input … Read more
18 min Score: 0 Attempted: 0/18 Subscribe 1. A low-pass filter allows signals with frequencies: (A) Higher than the cutoff frequency (B) Both higher and lower than the cutoff frequency (C) Equal to the cutoff frequency (D) Lower than the cutoff frequency 2. In a low-pass filter, the cutoff frequency is the point at which … Read more
20 min Score: 0 Attempted: 0/20 Subscribe 1. In a DC circuit, the current flows in: (A) One direction only (B) Alternating directions (C) Both directions simultaneously (D) A non-linear direction 2. In a simple DC circuit consisting of a 12V battery and a resistor of 6Ω, the current flowing through the circuit is: (A) … Read more
13 min Score: 0 Attempted: 0/13 Subscribe 1. The voltage divider rule is used to calculate the voltage across a resistor in a series circuit. The voltage across a resistor is proportional to: (A) The current through the resistor (B) The resistance of the resistor (C) The total voltage of the circuit (D) The total … Read more
15 min Score: 0 Attempted: 0/15 Subscribe 1. In a series circuit, the current flowing through all components is: (A) Different (B) The same (C) Zero (D) Dependent on the resistance of each component 2. In a series circuit, the total resistance is the sum of the individual resistances. If three resistors with values 10 … Read more