I-V characteristics of four devices

Question:

I-V characteristics of four devices are shown in the figure.

Identify devices that can be used for modulation:

(a) ‘i’ and ‘iii’

(b) only ‘iii’

(c) ‘ii’ and some regions of ‘iv’

(d) All the devices can be used.

 

Solution:

(c) ‘ii’ and some regions of ‘iv’

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