As the input voltage is varied, the light output from a filament lamp is: a directly proportional to the input voltage b of constant color temperature for tungsten

c a non$-$linear relationship d reduced as the voltage is increased

$2.$ The Solar Cell is a form of: a photovoltaic cell b light dependent resistor c photoconductive cell d phototransistor $3.$ A photovoltaic cell gives an output of $0\mathrm{.}5$V for a certain illumination level and is capable of a current output of $5$mA$.$ With two identical units connected $($i$)$ in series or

$($ii$)$ in parallel the output capability will be: a $($i$)$ V $=0\mathrm{.}5$V$,($ii$)$ I $=5$mA b $($i$)$ V $=1\mathrm{.}0$V$,($ii$)$ I $=5$mA

c $($i$)$ V $=0\mathrm{.}5$V$,($ii$)$ I $=10$mA d $($i$)$ V $=1\mathrm{.}0$V$,($ii$)$ I $=10$mA