Below we give four entries for the truth table of two point input $OR$ gate. Which two are wrong?

	$A$	$B$	$Y$
(i)	$1$	$0$	$1$
(ii)	$1$	$1$	$0$
(iii)	$0$	$0$	$1$
(iv)	$0$	$1$	$1$

In the network shown,

Two identical $p$-$n$ junctions may be connected in series with a battery in three ways (figure). The potential differences across the two $p$-$n$ junctions are equal in,

The $p$-$n$ junction conducts when $A$ and $B$ are connected to the,

When the $\mathrm{n}-\mathrm{p}-\mathrm{n}$ transistor is used as an amplifier, then