In a rectifier circuit, the diode serves to convert

Electrical Engineering XYZ MCQs In a rectifier circuit, the diode serves to convert: Correct answer: 1. Alternating current to direct current Explanation: A rectifier circuit is used to convert alternating current (AC) into direct current (DC). This is achieved using diodes. Diodes are semiconductor devices that allow current to flow in one direction only. In a rectifier circuit, … Read more

Which of below mentioned is a donor to a semiconductor material

Electrical Engineering XYZ MCQs Which of below mentioned is a donor to a semiconductor material: Correct answer: 2. Pentavalent Explanation: Semiconductor materials are crucial components in electronic devices, acting as conductors or insulators depending on the presence of impurities or “dopants”. These dopants are introduced intentionally to modify the conductivity of the semiconductor. In semiconductors, … Read more

A working diode must have

Electrical Engineering XYZ MCQs A working diode must have: Correct answer: 4. Low resistance when forward biased, while high resistance when reverse bias Explanation: So, the correct option is: Low resistance when forward biased, while high resistance when reverse biased.

The Barkhausen criterion for an oscillator

Electrical Engineering XYZ MCQs The Barkhausen criterion for an oscillator: Correct answer: 3. Both 1 and 2 Explanation: The Barkhausen criterion is a set of conditions that need to be satisfied for an oscillator to sustain oscillations. Let’s break down the options: Combining both statements, we see that both conditions are necessary for the Barkhausen … Read more

Relaxation Voltage controlled oscillators are used to generate

Electrical Engineering XYZ MCQs Relaxation Voltage controlled oscillators are used to generate: Correct answer: 3. Both 1 and 2 Explanation: So, the correct answer is “Both 1 and 2”. While relaxation oscillators directly generate triangular and sawtooth waves, with additional circuitry and adjustments, they can also contribute to generating sinusoidal waves indirectly.

Which of the following is not a sinusoidal oscillator

Electrical Engineering XYZ MCQs Which of the following is not a sinusoidal oscillator: Correct answer: 1. Relaxation oscillator Explanation: A relaxation oscillator generates non-sinusoidal waveforms. It operates by charging and discharging a capacitor through a nonlinear device such as a transistor or a diode. Examples include the astable multivibrator circuit and the 555 timer IC. … Read more

A quartz crystal oscillator consists of

Electrical Engineering XYZ MCQs A quartz crystal oscillator consists of: Correct answer: 1. Both series and parallel frequencies Explanation: A quartz crystal oscillator can operate at both its series resonant frequency and its parallel resonant frequency, depending on how it is configured within the oscillator circuit. These frequencies are determined by the physical characteristics of … Read more