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Test: The PN Junction As a Diode


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10 Questions MCQ Test Analog Electronics | Test: The PN Junction As a Diode

Test: The PN Junction As a Diode for Electrical Engineering (EE) 2022 is part of Analog Electronics preparation. The Test: The PN Junction As a Diode questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: The PN Junction As a Diode MCQs are made for Electrical Engineering (EE) 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: The PN Junction As a Diode below.
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Test: The PN Junction As a Diode - Question 1

How many junction/s do a diode consist?

Detailed Solution for Test: The PN Junction As a Diode - Question 1

Diode is a one junction semiconductor device which has one cathode and anode. The junction is of p-n type.

Test: The PN Junction As a Diode - Question 2

 If the positive terminal of the battery is connected to the anode of the diode, then it is known as

Detailed Solution for Test: The PN Junction As a Diode - Question 2

When a positive terminal is connected to the anode, the diode is forward biased which lets the flow of the current in the circuit.

Test: The PN Junction As a Diode - Question 3

 During reverse bias, a small current develops known as

Detailed Solution for Test: The PN Junction As a Diode - Question 3

When the diode is reverse biased, a small current flows between the p-n junction which is of the order of the Pico ampere. This current is known as reverse saturation current.

Test: The PN Junction As a Diode - Question 4

If the voltage of the potential barrier is V0. A voltage V is applied to the input, at what moment will the barrier disappear?

Detailed Solution for Test: The PN Junction As a Diode - Question 4

When the voltage will be same that of the potential barrier, the potential barrier disappears resulting in flow of current.

Test: The PN Junction As a Diode - Question 5

During the reverse biased of the diode, the back resistance decrease with the increase of the temperature. Is it true or false?

Detailed Solution for Test: The PN Junction As a Diode - Question 5

Due to the increase in the reverse saturation current due to the increase in the temperature, the back resistance decrease with the increasing temperature.

Test: The PN Junction As a Diode - Question 6

What is the maximum electric field when Vbi=2V , VR=5V and width of the semiconductor is 7cm?

Detailed Solution for Test: The PN Junction As a Diode - Question 6

Emax=-2(Vbi+VR)/W
=-2(2+5)/ (7*10-2)
=-200V/m.

Test: The PN Junction As a Diode - Question 7

When the diode is reverse biased with a voltage of 6V and Vbi=0.63V. Calculate the total potential.

Detailed Solution for Test: The PN Junction As a Diode - Question 7

Vt=Vbi+VR
=0.63+6
=6V.

Test: The PN Junction As a Diode - Question 8

 It is possible to measure the voltage across the potential barrier through a voltmeter?

Detailed Solution for Test: The PN Junction As a Diode - Question 8

The contacts of the voltmeter have some resistance which will not accurately measure the voltage across the potential barrier. Thus, it is not possible to measure the voltage across the potential barrier.

Test: The PN Junction As a Diode - Question 9

What will be the output of the following circuit? (Assume 0.7V drop across the diode)​

Detailed Solution for Test: The PN Junction As a Diode - Question 9

 V=12-0.7
=11.3V.

Test: The PN Junction As a Diode - Question 10

Which of the following formula represents the correct formula for width of the depletion region?

Detailed Solution for Test: The PN Junction As a Diode - Question 10

Option a is the correct formula.

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