Digital Electronics [GATE (Graduate Aptitude Test in Engineering) Instrumentation]: Questions 36 - 39 of 51

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Question 36

Appeared in Year: 2013

Question

MCQ▾

A bulb in a staircase has two switches, one switch being at the ground floor and the other one at the first floor. The bulb can be turned ON and also can be turned OFF by any one of the switches irrespective of the state of the other switch. The logic of switching of the bulb resembles

Choices

Choice (4)Response

a.

A NAND gate

b.

An OR gate

c.

An EX-OR gate

d.

An AND gate

Question 37

Appeared in Year: 2013

Question

MCQ▾

The digital circuit shown below uses two negative edge – triggered D – flip – flops. Assuming initial condition of and as zero, the output of this circuit is

The Circuit Consists of Dflipflop with Negative Edge-Triggering

Choices

Choice (4)Response

a.

00, 01, 10,11, 00 …

b.

00, 01, 11,11, 00 …

c.

00, 01, 11,10, 00 … .

d.

00, 11, 10,01, 00 …

Question 38

Appeared in Year: 2011

Question

MCQ▾

For the Boolean expression , the minimized Product of Sum (POS) expression is

Choices

Choice (4)Response

a.

b.

c.

d.

Question 39

Digital Electronics

Appeared in Year: 2013

Question

MCQ▾

In the circuit shown below what is the output voltage () in Volts if a silicon transistor Q and an ideal op-amp are used?

The Circuit Consisting an Ideal OPAMPto Find Its Output Voltage

Choices

Choice (4)Response

a.

0.7

b.

(-0.7)

c.

15

d.

(-15)

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