MCQ
Boolean expression for NAND gate is :
  • A
    $ A + B = Y $
  • B
    $ \overline{A + B} = Y $
  • $ \overline{A \cdot B} = Y $
  • D
    $ A \cdot B = Y $

Answer

Correct option: C.
$ \overline{A \cdot B} = Y $
C

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A generator has an e.m.f. of $440$ volt and internal resistance of $400$ ohm. Its terminals are connected to a load of $4000$ ohm. The voltage across the load is:
A photon and an electron have equal energy $ E\ \lambda_{\text {photon }} / \lambda_{\text {electron }}$ is proportional to
Which of the following (referred to a spherical mirror) do (does) not depend on whether the rays are paraxial or not?
In $\gamma\ \text{ray}$ emission from a nucleus:
A coil of circular cross$-$section having $1000$ turns and $4\ cm^2$ face area is placed with its axis parallel to a magnetic field which decreases by $10^{–2 }Wb m^{–2}$ in $0.01 s.$ The e.m.f. induced in the coil is:
The heat generated through 2 ohm and 8 ohm resistances separately, when a condenser of 200 μF capacity charged to 200 V is discharged one by one, will be(a) 4 J and 16 J respectively(b) 16 J and 4 J respectively(c) 4 J and 8 J respectively(d) 4 J and 4 J respectively
   
   
The magnetic field at the centre of a circular coil of radius $r$ is $\pi$ times that due to a long straight wire at a distance $r$ from it, for equal currents. Figure here shows three cases : in all cases the circular part has radius $r$ and straight ones are infinitely long. For same current the $B$ field at the centre $P$ in cases $1,2,3$ have the ratio


 
In a laboratory experiment on emission from atomic hydrogen in a discharge tube, only a small number of lines are observed whereas a large number of lines are present in the hydrogen spectrum of a star. This is because in a laboratory:
  1. The amount of hydrogen taken is much smaller than that present in the star.
  2. The temperature of hydrogen is much smaller than that of the star.
  3. The pressure of hydrogen is much smaller than that of the star.
  4. The gravitational pull is much smaller than that in the star.
An electron is moving with constant velocity along x - axis. If a uniform electric field is applied along y- axis, then its path in the x - y  plane will be    (a) A straight line(b) A circle(c) A parabola(d) An ellipse
       
A current of 2.0 ampere passes through a cell of e.m.f. 1.5 volts having internal resistance of 0.15 ohm.  The potential difference measured, in volts, across both the ends of the cell will be(a) 1.35(b) 1.50(c) 1.00(d) 1.20