ECE :: Materials and Components
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Assertion (A): If an atom of polarizability a is placed in homogeneous field E, the energy stored is 0.5 aE2.
Reason (R): Capacitance of an isolated conducting sphere R in vacuum is 4 p∈0 R farads.
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Which of the following are true for relative dielectric constant?
- It is dimensionless.
- It is equal to 1 for vacuum.
- It is equal to 1 for all substances.
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Hall effect is observed in a specimen (metal or semi- conductor) when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is
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The capacitance of a capacitor is not affected by
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When an atom of polarizability a is placed in an electric field E, the energy stored in atom is 0.5 a E2.
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The merger of hole and free electron is called
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