Questions in semiconductor

Select	Question
	In a PN-junction diode
	The cut-in voltage for silicon diode is approximately
	The electrical circuit used to get smooth $dc$ output from a rectifier circuit is called
	PN-junction diode works as a insulator, if connected
	The reverse biasing in a PN junction diode
	The electrical resistance of depletion layer is large because
	In the circuit given below, the value of the current is
	What is the current in the circuit shown below
	If the forward voltage in a semiconductor diode is doubled, the width of the depletion layer will
	The PN junction diode is used as