Q. The induced magnetic dipole moment has a direction opposite to the applied magnetic field.

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Q. An atom of polarizability a is placed in a homogeneous electric field E. The energy stored in polarized atom is

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Q. If B, H and M denote flux density, field intensity and magnetisation, B = μ₀ (H + M).

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Q. A capacitor can be represented by a capacitance and resistance in parallel. For a good capacitor, this parallel resistance should be

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Q. Assertion (A): Ionic solids, in general, have no electrical conductivity.

Reason (R): In ionic solids, electrons are tightly bound to the nucleus.

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Q. Tesla is a unit of

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Q. If the operating temperature increases by 10°C, the rate of deterioration of solid dielectric becomes

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Q. In which of the following semiconductor are holes minority carriers

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Q. At 0 K, silicon and germanium behave like monoatomic crystals.

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Q. Assertion (A): Acceptor extrinsic semiconductor has higher conductivity than intrinsic semiconductor.

Reason (R): Addition of p-type impurity produces an allowable discrete energy level just above valence band.

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Q. When temperature is above ferromagnetic Curie temperature, a ferromagnetic material

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Q. A magnet does not attract

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Q. Bitter powder patterns prove the existence of domains.

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Q. Assertion (A): An amorphous material is obtained when mobility of atoms is inhibited during solidification.

Reason (R): Crystalline state is a natural state for most solids.

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Q. An air cored inductance is a

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Q. The number of valence electrons in silicon atom is

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Q. ∈ᵣ is determined by the atomic structure of the dielectric.

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Q. A rare gas has N atoms per m³. If electronic polarizability of single atom of this gas is αe, then

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Q. The colour code on a carbon resistor is brown-black-red-gold. The value of resistance is

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Q. M = (μᵣ - 1)H.

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