Question

With the help of a diagram, show how you can use several NAND gates to obtain an OR gate.

Useful Constants and Relations :

1. Speed of Light in Vacuum	(c) = 3.00 x 108 m/s
2. Charge of a proton	(e) = 1.60 x 10-19C
3. Planck's Constant	(h) = 6.6 x 10-34 Js
4. Permeability of vacuum	(μ0) = 4π x 10-7 Hm-1
5. Electron Volt	(1eV ) = 1.6 x 10
6. Unified Atomic Mass Unit	(1u) = 931 MeV
	(π) = 3.14
	( ln 2 ) = 0.693

Answer 1

In the figure is shown an ‘OR’ gate produced by combining ‘NAND’ gates only.