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GATE 2022 Toppers Quiz 18

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Question 1

The time period of the output generated by the op-amp circuit shown in figure is  (in sec). (For diode V= 0.7 V).

Question 2

A uniform plane wave in the free space is normally incident on an infinity thick dielectric slab (dielectric constant ). The magnitude of the reflection coefficient is

Question 3

In the circuit shown, what value of RL the maximum power is delivered to RL?

Question 4

A second-order linear time-invariant system is described by the following state equations
 
where x1(t) and x2(t) are the two state variables and u(t) denotes the input. If the output c(t) = x1(t), then the system is

Question 5

The first two rows in the Routh table for the characteristic equation of a certain closed-loop control system are given as
46.PNG
The range of K for which the system is stable is

Question 6

In the Digital -toAnalog conveter circuit shown in the figure below, VR =10 V and R = 10 kΩ

The current i is:

Question 7

An 8255 chip is interfaced to an 8085 Microprocessorsystem as an I/O mapped I/O as shown in the figure. The address lines A0 and A1 of the 8085 are used by the 8255 chip to decode internally its three ports and the Control register. The address lines A3 to A7 as well as the IO/ signal are used for address decoding. The range of addresses for which the 8255 chip would get selected is:

Question 8

In the following limiter circuit, an input voltage Vi = 10 sin 100πt applied. Assume that the diode drop is 0.7V when it is forward biased. The zener breakdown voltage is 6.8 V.

The maximum and minimum values of the output voltage respectively are
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Dec 30ESE & GATE EC