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

Graph showing the variation of current versus voltage for a material G

1.	Graph showing the variation of current versus voltage for a material GaAs is shown in figure. Identify the region of (i) negative resistance (ii) where Ohm's law is obeyed.
Answer» Solution :Side BANDS (Lower side band and upper side band) are produced due to SUPERPOSITION of low frequency modulating SIGNALS on HIGH frequency carrier waves. Reason: The frequency of lower side band is `omega_(c )-omega_(m)`and of upper side band is `omega_(c )-omega_(m)`.

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

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