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GATE 2024 Subject Name Foundation Quiz 57

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Question 1

In the circuit shown below, the Zener diode is ideal and the Zener voltage is 6V. The output voltage V0 (in volts) is ____________.
Description: D:\GradeStack Courses\GATE Tests (Sent by Ravi)\GATE EC 10-Mar\GATE-ECE-2015-Paper-1_files\image059.jpg

Question 2

A half wave rectifier has a load resistance of 1.2 KΩ and peak ac voltage is 320 V. The root mean square value of current Is, if Rf = 100 Ω, where the symbols have their usual meaning.

Question 3

A junction field effect transistor is shown in the figure. Its drain to source safe current is 20mA and pinch off voltage is -7.8 V. Also rd is given as 30 kΩ

The voltage gain of the amplifier is

Question 4

In the circuit shown, the breakdown voltage and the maximum current of the Zener diode are 20 V and 60 mA, respectively. The values of R1 and RL are 200 Ω and 1 kΩ, respectively. What is the range of Vi that will maintain the Zener diode in the ‘on’ state?

Question 5

A DC current of 26 μA flows through the circuit shown. The diode in the circuit is forward biased and it has an ideality factor of one. At the quiescent point, the diode has a junction capacitance of 0.5 nF. Its neutral region resistances can be neglected. Assume that the room temperature thermal equivalent voltage is 26 mV.

For the amplitude of the small-signal component of diode current (in μA, correct to one decimal place) is ___________.

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