$1-$The $p-n$ device is not used as

a$-$ Rectifier

b$)$Freewheeling protection

c$)$ Polarity protection

d$)$amplification

$2-$ The output current in the circuit contains de source, $L$ load with switch is closed at $t=0$ is

a$-$ Rise exponential

b $-$Rise linearly

$c-$ Equal constant

d$-$Rise linearly with forced component

$3-$The time unit of $0\mathrm{.}005($s$)$ equal in degrees is

a$)45$

b$)180$

c$)270$

d$)90$

$4-$ For a three$-$phase full wave controlled rectifier with R load, the average value of output voltage is zero for

a$)=0$

b$)=90$

c$)=180$

d$)$ It can never be zero

$5-$ The static V$-$I curve for the SCR is plotted for

a$)$ Ia $($anode current$)$ vs Ig $($gate current$),$ Va $($anode $-$ cathode voltage$)$ as a parameter

b$)$ Ia vs Va with Ig as a parameter

c$)$ Va vs Ig with Ia as a parameter

d$)$ Ig vs Vg with Ia as a parameter

$6-$The extinction angle of controlled rectifier with $r$ load circuit

a$-$Sometimes equal zero degree

b$-$Sometimes equal $180$ degrees

c$-$All times equal zero degree

d$-$All times equal $180$ degrees

$7-$The current of input power with single phase controlled rectifier is worked in Jordan equal

a$-$Ioav

b$-$Voav$/$r

c$-$Imo

d$-$I$0$

$8-$The secondary current $12$ in three phase controlled rectifier with R load circuit is

a$-$Io $\frac{2}{\sqrt[\phantom{2}]{3}}$

b$-$Ioavx $\frac{\sqrt[\phantom{2}]{2}}{\sqrt[\phantom{2}]{3}}$

c$-$Io $\frac{\sqrt[\phantom{2}]{2}}{\sqrt[\phantom{2}]{6}}$

$d-lo\frac{\sqrt[\phantom{2}]{2}}{\sqrt[\phantom{2}]{3}}$