GATE 1988 Video Solutions on EDC (Electronic Devices and Circuits)

1.       For a PN junction, match the type of breakdown with phenomenon

i.         Avalanche breakdown

ii.       Zener breakdown

iii.      Punch through

a.       Collision of carriers with crystal ions

b.      Early effect

c.       Rupture of covalent bond due to strong electric field

Answer:i-a, ii-c, iii-b

                 Solution :https://www.youtube.com/watch?v=EN4l13yKuqM

2.       In the circuit shown below, the current voltage relationship when D₁ and D₂ are identical is given by  (assume Germanium diodes)

Answer:B

                 Solution : https://www.youtube.com/watch?v=TKrqrKu90i8

3.       In an N-channel JFET, V_GS is held constant. V_DS is less than the breakdown voltage. As V_DS is increased…(Assume ‘S’ as conducting cross sectional area of the channel and ‘J’ as channel current density)

a.       ‘S’ increases and ‘J’ increases 

b.      ‘S’ decreases and ‘J’ decreases

c.       ‘S’ decreases and ‘J’ increases

d.      ‘S’ increases and ‘J’ decreases

Answer:C

                 Solution : https://www.youtube.com/watch?v=5wE7t_1k180

4.       In MOSFET devices, the N-channel type is better than the P-channel type in the following respects

a.       It has better noise immunity

b.      It is faster

c.       It is TTL compatible

d.      It has better drive capability

Answer:D

                 Solution : https://www.youtube.com/watch?v=i0tBM4SR3ug