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1. In a semiconductor, if the charge carriers can make a transition from the valence to the conduction band without the change in the momentum value, the material is known as.
(A) Wide band gap material
(B) Narrow band gap material
(C) Direct band gap material
(D) Indirect band gap material
2. Which of the following transistors can be used in a E - mode-?
(C) n-p-n transistor
3. The transient current in loss free L - C circuit when excited from an ac source is':
(A) an under damped
(B) an undamped
(C) an over damped
(D) critically damped
Click Here to find Electronic Science (June 2006) complete question paper