In the given circuits (a), (b) and (c), the potential drop across the two \({\mathrm{p\text-n}}\) junctions are equal in: 
        

1.	both circuits (a) and (c)
2.	circuit (a) only
3.	circuit (b) only
4.	circuit (c) only

The output of the logic circuit shown is equivalent to a/an:
        
1. \(\mathrm{OR}\) gate
2. \(\mathrm{NOR}\) gate
3. \(\mathrm{AND}\) gate
4. \(\mathrm{NAND}\) gate

The circuit represents a full wave bridge rectifier when switch \(S\) is open. The output voltage \((\text V_0)\) pattern across \(R_L\) when \(S\) is closed:
 

1.		2.
3.		4.