Logic Gates

Question 1

Or gate Circuit

Answer 1

---•  •----|>|------
  |                              |
  |                              |----•Y
  |                              |    |
Bat.  •-----|>|------   Resistance 
  |                                   |
Earthed.                  Earthed

Forward biased

Question 2

And gate circuit

Answer 2

—•. •—|

Question 3

Not gate circuit

Answer 3

____bat___
|. |
Earthd. Rstnc
|——•Y
—•. •—-Rstnc—Trnstr
|. |
Bat. Earthed
|
Earthd