A crystal is said to be face centred when one extra atom (or molecule) lies at the centre of:
Correct answer: C. Each of the six faces of the cube
- A. Two sides
- B. Four sides
- C. Each of the six faces of the cube
- D. The cube
Explanation
In a face-centered crystal lattice, an additional atom (or molecule) is positioned at the center of each face of the unit cell. This means that in addition to the atoms at the corners of the unit cell, there is another atom at the center of each face of that cell, contributing to the structure's symmetry and arrangement.
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A p-n junction forms when p-type and n-type semiconductor regions meet, creating a depletion layer, barrier potential and rectifying action. The work covers forward and reverse bias, junction current, diode characteristics, and how a diode converts alternating current into pulsating direct current through half-wave and full-wave rectification.
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