EASY
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The value of ripple factor for full wave rectifier is 1.21.

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Important Questions on Semiconductor Devices

EASY
In the circuit shown below, is working as a 8 V dc regulated voltage source. When 12 V is used as an input, the power dissipated (in mW ) in each diode is (Considering both zener diodes are identical) 
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MEDIUM
Draw a labelled circuit diagram of a half wave rectifier and give its output waveform.
EASY

LED emits light when connected in _____.

(Fill in the blank using 'forward bias' or 'reverse bias')

HARD

Draw a labelled diagram of a Zener diode as a voltage regulator.

MEDIUM

What is the advantage of an LED bulb over filament bulb?

EASY
In full wave rectification input frequency is 60 Hz. What will be the output frequency for that?
EASY

Draw circuit diagram for a P-N junction to obtain reverse bias characteristic curves. Explain the phenomenon of reverse breakdown for a P-N junction in reverse bias state by following process-

ii Zener breakdown

MEDIUM

In a semiconductor diode, what is meant by a potential barrier?

EASY

The forward characteristic curve of a junction diode is shown in the figure :

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Calculate the resistance of the diode at

(i)  V=0·5 V

(ii) I=60 mA

MEDIUM

With reference to semiconductor devices, define a p-type semiconductor and a Zener diode. What is the use of Zener diode?

MEDIUM
Both the diodes used in the circuit shown are assumed to be ideal and have negligible resistance when these are forward biased. Built in potential in each diode is 0.7V. For the input voltages shown in the figure, the voltage (in Volts) at point A is ________
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EASY
In half-wave rectification, what is the output frequency if the input frequency is 50 Hz. What is the output frequency of a full-wave rectifier for the same input frequency?
MEDIUM
A p-n photodiode is fabricated from a semiconductor with band gap of 2.8 eV. Can it detect a wavelength of 6000 nmh = 6.626×10-34 Js
MEDIUM
Avani’s family uses filament bulbs at home while Om’s family uses LED bulbs. Which family will save more electricity? Write five other ways to save electricity.
EASY
How many diode/s is/are used in designing of half wave rectifier circuit?
EASY
The ripple factor for a full wave rectifier is _____.