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Digital Electronics

Digital Electronics
What is the minimum number of 2 input NAND gates used to perform the function of 2 input OR gate

 1
 4
 2
 3

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Digital Electronics
A device which converts decimal number into BCD form is called

 code converter
 decoder
 encoder
 multiplexer

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

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Digital Electronics
In which of the following codes do the successive characters differ in only 1-bit position?

 8421 code
 binary code
 2421 code
 cyclic code

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Digital Electronics
How many input and output required for multiplexer ?

None of these
 Many input and one output
 One input and many output
 One input and one output

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Digital Electronics
What logic function is produced by adding inverters to the inputs of an OR gate?

 NAND
 NOR
 AND
 X-NOR

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