Which of the following is not a semiconductor ?
Indium
A semiconductor is a material whose conductivity lies between that of a conductor and an insulator and whose band gap is small enough (roughly 0.1 to 3 eV) for thermal energy or doping to control the number of free carriers. Elemental semiconductors come from group IV of the periodic table, and compound semiconductors are formed from group III and group V (or II and VI) elements.
Indium is a group III element, but on its own it is a soft metal with a partially filled conduction band and no band gap, so it conducts like a metal. In semiconductor technology indium appears only as an acceptor dopant or as a constituent of compounds such as indium phosphide and indium antimonide; the pure element is not a semiconductor.
Gallium arsenide is a direct band-gap III–V compound semiconductor (about 1.43 eV) used in LEDs, lasers and microwave devices. Germanium (about 0.67 eV) and silicon (about 1.1 eV) are the classic elemental group IV semiconductors used in diodes, transistors and integrated circuits.
Indium option is correct.
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Important Questions from Mixed Topic (MH-SET)
.................... is a client server application that identifies each host on the internet with a unique user-friendly name.
Every OS has a ................ or .......... which primarily resides in the main memory of the computer to perform some of the basic functions of the OS.
(i) Kernel
(ii) Interface
(iii) Nucleus
(iv) Compiler
Codes:
Which of the following are referred to as low level language?
(i) Machine language
(ii) Assembly language
(iii) High level language
(iv) Natural language
Codes:
Match the following:
List I List II (a) New York Public Library (i) Shelv AR (b) Miami University Augmented Research Group (ii) Smart library (c) Oula University Library (iii) Wolf Walk (d) North Carolina State University (iv) Find the future Codes:
Which part of the QR code represents the encoded data?
