Questions in semiconductor

Select	Question
	When a PN junction diode is reverse biased
	Two PN-junctions can be connected in series by three different methods as shown in the figure. If the potential difference in the junctions is the same, then the correct connections will be
	A PN- junction has a thickness of the order of
	In the depletion region of an unbiased P-N junction diode there are
	On increasing the reverse bias to a large value in a PN-junction diode, current
	In the case of forward biasing of PN-junction, which one of the following figures correctly depicts the direction of flow of carriers
	Which of the following statements concerning the depletion zone of an unbiased PN junction is (are) true
	A semiconductor device is connected in a series circuit with a battery and a resistance. A current is found to pass through the circuit. If the polarity of the battery is reversed, the current drops almost to zero. The device may be
	The approximate ratio of resistances in the forward and reverse bias of the PN-junction diode is
	In a junction diode, the holes are due to