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Digital Electronics

Digital Electronics
For 4 bit parallel addition, we need ________ half adder(s) and ________ full adder(s)

 0 and 4
 0 and 3
 1 and 4
 1 and 3

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Digital Electronics
The effect of stray magnetic field on the actuating torque of a portable instrument is maximum when the operating field of the instrument and the stray fields are

  Parallel.
 Perpendicular.
 Inclined at 30°.
 Inclined at 60°.

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Digital Electronics
A gate is enabled when its enable input is at logic 0. The gate is

 NAND
 none of these
 AND
 NOR

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Digital Electronics
In decimal number system what is MSD

 Mean of all digits
 First digit from right to left
 Middle digit
 First digit from left to right

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Digital Electronics
16’s complement of BABA is?

 4446
 4544
 4546
 4445

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Digital Electronics
To add two m-bit numbers, the required number of half adder is

 2m-1
 2m
 2m-1
 2m+1

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