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## QuestionPhysicsClass 12

Digital signals
$$(i)$$ do not provide a continuous set of values,
$$(\mathit{ii})$$ represent values as discrete steps,
$$(\mathit{iii})$$ can utilize binary system, and
$$(\mathit{iv})$$ can utilize decimal as well as binary systems.
Which of the above statements are true?
$$\left(a\right)\left(i\right)$$ & $$\left(\mathit{iii}\right)$$ only
$$\left(b\right)\left(\mathit{ii}\right)$$ & $$\left(\mathit{iii}\right)$$ only
$$\left(c\right)\left(i\right),\left(\mathit{ii}\right)$$ & $$\left(\mathit{iii}\right)$$ but not $$(\mathit{iv})$$
$$(d)$$ all of $$\left(i\right),\left(\mathit{ii}\right),\left(\mathit{iii}\right)$$ & $$(\mathit{iv})$$

$$\left(c\right)\left(i\right),\left(\mathit{ii}\right)$$ & $$\left(\mathit{iii}\right)$$ but not $$(\mathit{iv})$$
Digital signals use only two steps in general-$$($$High & Low$$)$$
$$(i)$$ signal is not using continuous set of values
$$(\mathit{ii})$$ only two steps $$0$$ & $$1$$  $$($$discrete$$)$$ are there
$$(\mathit{iii})$$ Binary system $$($$uses only $$0$$ & $$1$$$$)$$
$$(\mathit{iv})$$ There are only two steps $$($$decimal system can not be used$$)$$