Basic electronics questions and answers free download

In forward biasing , the applied voltage V of the battery mostly drops across the depletion region and the voltage drops across the p-side and n-side of the p-n junction is negligibly small. It is because the resistance of the depletion region is very high as it has no free charge carriers. In forward biasing the forward voltage opposes the potential barrier V b. As a result of it, the potential barrier height is reduced and the width of the depletion layer decreases.

As forward voltage is increased, at a particular value the depletion region becomes very much narrow such that a large number of majority charge carriers can cross the junction.

Get Started for Free Download App. Emitter junction is forward biased and collector junction is reverse biased Emitter junction is reverse biased and collector junction is forward biased Emitter junction junction is reverse biased and collector junction is reverse biased Emitter junction is forward biased and collector junction is forward biased. Answer Detailed Solution Below Option 1 : Emitter junction is forward biased and collector junction is reverse biased. BJT's are current-driven devices i.

It is a current-controlled device. The current through the two terminals is controlled by a current at the third terminal base. It is a bipolar device current conduction by both types of carriers, i. Emitter junction is forward biased and collector junction is reverse biased BJT works as a variable resistance. Exactly double the voltage Stabilize the voltage Step up the voltage Step down the voltage.

A buck converter step-down converter is a DC-to-DC power converter that steps down voltage while stepping up current from its input supply to its output load.

It is a class of switched-mode power supply SMPS typically containing at least two semiconductors a diode and a transistor, although modern buck converters frequently replace the diode with a second transistor used for synchronous rectification and at least one energy storage element in the form of capacitor, inductor, or the two in combination.

To reduce voltage ripple, filters made of capacitors sometimes in combination with inductors are normally added to output load-side filter and input supply-side of this converter.

Switching converters such as buck converters provide much greater power efficiency for DC-to-DC conversion than linear regulators, which are simpler circuits that lower voltages by dissipating power as heat, but they do not step up output current. Inductor Capacitor Resistor Transistor. LC oscillator consists of an amplifier and tuned LC circuit as feedback network. Internet Download Manager. Advanced SystemCare Free. VLC Media Player. MacX YouTube Downloader.

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You will find lots of questions and answers in each chapter. All the questions have been included with just one thing in mind — To provide you a better understanding of the subject. Electronic Components :- 1. Electronic Meters Digital Electronics :- Logic Circuits Integrated Circuits :- To see questions and answers just click on the chapter you wish.

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