The following figure shows device X with input and output signals. The device is:

Answer & explanation
Correct answer: option 1
$\text{Output of only half part is available so its an output of half wave rectifier}$
The following figure shows device X with input and output signals. The device is:

Correct answer: option 1
$\text{Output of only half part is available so its an output of half wave rectifier}$