Electrical Engineering MCQs

Page No. 28

In case of OR gate, no matter what the number of inputs, a____________________?


a1 at any input causes the output to be at logic 1

✓


b1 at any input causes the output to be at logic 0

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c0 any input causes the output to be at logic 0

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d0 at any input causes the output to be at logic 1

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A debouncing circuit is________________?


aan astable MV

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b a bistable MV

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c a latch

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da monostable MV

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View Answer a latch

An AND gate will function as OR if________________?


aall the inputs to the gates are “1”

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ball the inputs are ‘0’

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ceither of the inputs is “1”

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dall the inputs and outputs are complemented

✓



NAND gates are preferred over others because these__________________?


ahave lower fabrication area

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bcan be used to make any gate

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cconsume least electronic power

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dprovide maximum density in a chip

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An OR gate has 6 inputs. The number of input words in its truth table are________________?


a 6

✖


b32

✖


c64

✓


d128

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View Answer 64

Among the logic families, the family which can be used at very high frequency greater than 100 MHz in a 4 bit synchronous counter is__________________?


aTTLAS

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bCMOS

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cECL

✓


dTTLLS

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View Answer ECL

Positive logic in a logic circuit is one in which______________?


alogic 0 and 1 are represented by 0 and positive voltage respectively

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blogic 0 and, -1 are represented by negative and positive voltages respectively

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clogic 0 voltage level is higher than logic 1 voltage level

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dlogic 0 voltage level is lower than logic 1 voltage level

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The number of Boolean functions that can be generated by n variables is equal to_________________?


a2n

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b22 n

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c2n-1

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d— 2n

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View Answer 22 n

The number 1000 would appear just immediately after__________________?


aFFFF (hex)

✓


b1111 (binary)

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c 7777 (octal)

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dAll of the above

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View Answer FFFF (hex)

What is the octal equivalent of the binary number : 10111101 ?


a675

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b275

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c572

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d573

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View Answer 275

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