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Mr. Dubey • 52.30K Points
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Q. When either a voltage or current is applied to the terminals of bulk solid state compound GaAs, a differential              is developed in that bulk device.

(A) negative resistance
(B) positive resistance
(C) negative voltage
(D) none of the mentioned
Correct : Option (A)

Explanation: 
 when either a voltage or current is applied to the terminals of a sample of bulk solid state compound formed by group 5 and 3 elements of periodic table, a differential resistance is developed in the bulk device. this fundamental concept is called rwh theory.

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