Q. Electrical conductivity of metals expressed in ohm¯¹ m¯¹ is of the order of

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Q. In a metal the probability of a state 0.1 eV below Fermi level being occupied

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Q. An homogeneous dielectric material is subjected to an electric field E. If a small cavity is made inside the material, the electric field intensity inside and outside the cavity are different.

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Q. A dielectric is subjected to alternating field. The dielectric losses are potential to

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Q. If there are no permanent dipoles in a dielectric material, the dielectric constant is independent of temperature.

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Q. Assertion (A): Magnetic susceptibility of copper is -0.5 x 10¯⁵.

Reason (R): Copper is diamagnetic material.

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Q. An electron shell corresponding to principal quantum number n can contain a maximum of

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Q. A sheet of bakelite is inserted between the plates of an air capacitor. The capacitance will

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Q. The spin angular momentum along a given direction is either +h/4π or -h/4π .

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Q. Assertion (A): Diamond and carborudum are both very hard materials.

Reason (R): Valence band can be extremely strong.

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Q. The chemical properties of atoms are determined by all the electrons and their configuration.

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Q. Nichrome is used for

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Q. If k is Boltzmann's constant and T is absolute temp, then at room temp.

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Q. If the valence electron is separated from a copper atom, the remaining part of atom has a net charge of

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Q. The number of tightly bound electrons in silicon atom are

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Q. Electric dipole moment is usually expressed in debye units. Here, 1 debye unit equals

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Q. A particle of charge Q coulombs is bound elastically to an equilibrium position with a force constant of f newton per metre. The polarizability of the system is

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Q. 1 Bohr magneton = eh/(4πm) .

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Q. An electron (charge -e) is rotating in a circular orbit of radius R, around a proton with charge +e at a constant angular velocity ω. The orbital magnetic dipole moment is

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Q. The dielectrics having only one kind of atoms are known as elemental dielectrics.

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