11. The maximum operating frequency of a diode when used as a switch :
(a) Depends on the diode characteristics and switching voltages
(b) Depends on switching voltages
(c) Depends on diode characteristics
(d) None of the above
12. The saturation current in a diode depends upon :
(a) Plate voltage
(b) Cathode temperature
(c) Cathode material
(d) Separation between cathode and plate
13. The PN junction diode is a :
(a) Passive device
(b) Vacuum device
(c) Unilateral device
(d) Bilateral device
14. The time required to switch a PN junction from ON to OFF is equal to :
(a) Zero
(b) Storage time
(c) Switching time
(d) Transition time
15. If the PN junction is abrupt, the capacitance varies as :
(a) Square root of reverse bias
(b) Square of reverse bias
(c) Cube root of reverse bias
(d) Cube of reverse bias
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