ECE :: Materials and Components
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The temperature below which certain materials are antiferromagnetic and above which they are paramagnetic is called
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In metals, the average drift velocity of electron per unit field is called mobility.
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Ferrites have
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In intrinsic semiconductors, the number of free electrons is equal to the number of mobile holes.
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When a material becomes a superconductor, its resistivity becomes
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In a piezoelectric crystal, the application of mechanical force will cause
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Consider the following statement
If an electric field is applied to an n type semiconductor bar, the electrons and holes move in opposite directions due to their opposite charges. The net currents is- both due to electrons and holes with electrons as majority carriers
- sum of hole and electron currents
- difference between electron and hole currents.
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As the temperature of a pure silicon specimen is increased
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Assertion (A): In many materials, dielectric polarization causes mechanical distortion.
Reason (R): If dielectric polarization causes mechanical distortion then mechanical distortion must cause dielectric polarization.
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