(i) Graph showing the variation of current versus voltage for a materi

1.	(i) Graph showing the variation of current versus voltage for a material GaAs is shown in the figure. Identify the region of negative resistance(ii) Where Ohm’s law is obeyed.
Answer» (i) In region DE, material GaAs (Gallium Arsenide) offers negative resistance, because slope \(<\frac{\triangle V}{\triangle I}<0.\) (ii) The region BC approximately passes through the origin, (or current also increases with the increase of voltage). Hence, it follows Ohm’s law and in this region \(\frac{\triangle V}{\triangle I}>0.\)

(i) Graph showing the variation of current versus voltage for a material GaAs is shown in the figure. Identify the region of negative resistance(ii) Where Ohm’s law is obeyed.

Answer»

(i) In region DE, material GaAs (Gallium Arsenide) offers negative resistance,

because slope \(<\frac{\triangle V}{\triangle I}<0.\)

(ii) The region BC approximately passes through the origin, (or current also increases with the increase of voltage).

Hence, it follows Ohm’s law and in this region \(\frac{\triangle V}{\triangle I}>0.\)