Q11 of 805 Page 1

What are the universal gates? How can AND gate be realized using an appropriate combination of NOR gates?

Universal Gates are called so because by using these gates other basic gates like OR, AND and NOT are realized and these gates are inexpensive to manufacture and simple to construct large circuits.



The AND gate can be realized by NOR gates as follows,



More from this chapter

All 805 →
9

Compare the following

(i) Wavelengths of the incident solar radiation absorbed by the earth’s surface and the radiation re-radiated by the earth.


(ii) Tanning effect produced on the skin by UV radiation incident directly on the skin and that coming through glass window.

 10

A narrow slit is illuminated by a parallel beam of monochromatic light of wavelength λ equals to 6000 Å and the angular width of the central maxima in the resulting diffraction pattern is measured. When the slit is next illuminated by the light of wavelength λ’, the angular width decreases by 30%. Calculate the value of the wavelength λ’.

12

A TV transmission tower antenna is at the height of 20 m. How much range can it cover if the receiving antenna is at the height of 25 m?

 13

A particle, having a charge +5 μC, is initially at rest at the point x = 30 cm on the x-axis. The particle begins to move due to the presence of a charge Q that is kept fixed at the origin. Find the kinetic energy of the particle at the instant it has moved 15 cm from its initial position if (a) Q =+15μC and (b) Q = -15μC.