Q. The iron core of a coil is removed so that it becomes an air cored coil. Its inductance will

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Q. A circular sphere mile is the area of cross-section of a wire

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Q. In an hydrogen atom, an electron moves in the field of a proton. The stability of orbit requires equilibrium between coulomb's force and centrifugal force.

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Q. For small size high frequency coils, the most common core material is

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Q. The orientation polarization of a polyatomic gas is inversely proportional to absolute temperature.

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Q. For a given value (n) of principle quantum number, the number of possible electronic states are

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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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