Advertisements
Advertisements
प्रश्न
The ______, a property of materials C, Si, and Ge depends upon the energy gap between their conduction and valence bands.
Advertisements
उत्तर
The conductivity, a property of materials C, Si, and Ge depends upon the energy gap between their conduction and valence bands.
Explanation:
The conductivity of materials like Carbon (C), Silicon (Si), and Germanium (Ge) depends on the energy gap between the valence band and conduction band. A smaller energy gap allows electrons to move easily to the conduction band, increasing conductivity. A larger energy gap results in lower conductivity.
संबंधित प्रश्न
Define the term 'conductivity' of a metallic wire. Write its SI unit.
The heat developed in a system is proportional to the current through it.
An electrolysis experiment is stopped and the battery terminals are reversed.
The specification on a heater coil is 250 V, 500 W. Calculate the resistance of the coil. What will be the resistance of a coil of 1000 W to operate at the same voltage?
A heater coil is to be constructed with a nichrome wire (ρ = 1.0 × 10−6 Ωm) that can operate at 500 W when connected to a 250 V supply. (a) What would be the resistance of the coil? (b) If the cross-sectional area of the wire is 0.5 mm2, what length of the wire will be needed? (c) If the radius of each turn is 4.0 mm, how many turns will be there in the coil?
Consider a current carrying wire (current I) in the shape of a circle.
The electric resistance of a certain wire of iron is R. If its length and radius are both doubled, then ______.
A man covers his body with a blanket of thickness 4 mm. His temperature is 37°C and that of the atmosphere is 27°C. If the coefficient of thermal conductivity of wool is 1.2 × 10-5 MKS units, heat lost by him per hour per square meter area is:
Consider four conducting materials copper, tungsten, mercury and aluminium with resistivity ρC, ρT, ρM and ρA respectively. Then:
