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Electrical and magnetic properties of solids

37 questions on Electrical and magnetic properties of solids from the Solid State chapter: 6 NEET level, 15 JEE Main, 16 JEE Advanced. Each one opens with its answer and solution.

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The defect in which an ion leaves its lattice site and occupies an interstitial position is called NEET level
Silicon doped with a small amount of phosphorus is a(n) NEET level
Which of the following ions is diamagnetic? NEET level
Molten NaCl is crystallised with 2.0x10^-3 mol per cent of SrCl2 as impurity (mol of SrCl2 per 100 mol of NaCl). Each Sr^2+ replaces two Na+ ions by occupying o... JEE Main level
Using the spin-only formula mu=sqrtn(n+2) BM, calculate the magnetic moment of the high-spin Fe^2+ ion present in a crystal (two decimals). JEE Main level
Which of the following statements about electrical conduction in solids are correct? JEE Main level
Germanium doped with a trace of gallium becomes a p-type semiconductor because JEE Main level
Which pairing of substance and magnetic behaviour is correct? JEE Main level
Heating a crystal of KCl in potassium vapour gives it a violet colour. The colour is due to JEE Main level
A ferromagnetic solid becomes paramagnetic above its Curie temperature because JEE Main level
A sample of NaCl (cubic, edge 564 pm, 4 formula units per ideal cell, M=58.5 g mol^-1) has measured density 2.1544 g cm^-3 because of Schottky defects, the cell... JEE Advanced level
Which of the following statements about point defects are correct? JEE Advanced level
Which of the following statements about doped semiconductors are correct? JEE Advanced level
Using the spin-only formula, which statements about the ions are correct? JEE Advanced level
Silicon has a band gap of 1.10 eV. Using hc=1240 eV nm, the longest wavelength of light that can excite an electron across the gap is nearest to JEE Advanced level
A solid contains, per formula unit, one Fe^3+ (high spin) and two Cu^2+ ions that behave as independent paramagnetic centres. Treating the moments as adding in ... JEE Advanced level
Silicon has a diamond-cubic cell of edge 5.43x10^-8 cm containing 8 Si atoms. It is doped with phosphorus at 1 P atom per 10^6 Si atoms. Each P donates one free... JEE Advanced level
Wustite has the composition Fe_0.93O with some Fe^2+ replaced by Fe^3+ so that the crystal is neutral. The percentage of the iron present as Fe^3+ is JEE Advanced level
Doping silicon with a small amount of phosphorus produces NEET level
Paramagnetism of a substance is due to the presence of NEET level
Which of the following is ferromagnetic at room temperature? NEET level
The magnetic property of Fe3O4 (magnetite) is JEE Main level
On increasing temperature from 300 K to 400 K, the electrical conductivity of copper and of pure silicon changes as JEE Main level
Germanium is doped with a trace of gallium. The doped crystal is JEE Main level
In a certain solid the magnetic moments of neighbouring ions are aligned in equal numbers in parallel and antiparallel directions, giving zero net magnetic mome... JEE Main level
Calculate the spin-only magnetic moment of the high-spin Fe^2+ ion (atomic number 26) in Bohr magnetons using mu=sqrtn(n+2) (two decimals). JEE Main level
Pure silicon (density 2.33 g cm^-3, atomic mass 28) is doped with boron so that there is one boron atom per 10^7 silicon atoms. Using N_A = 6.022x10^23 mol^-1, ... JEE Main level
Which of the following statements about semiconductors are correct? JEE Main level
Which of the following statements about magnetic properties are correct? JEE Main level
Silicon has a band gap of 1.12 eV. Using hc = 1240 eV nm, calculate the longest wavelength of light, in nm, that can excite an electron from the valence band to... JEE Advanced level
The ions Cu^2+, Cr^3+, Fe^2+ (high spin) and Mn^2+ (high spin) are arranged in increasing order of their spin-only magnetic moment. The correct order is JEE Advanced level
In magnetite, Fe3O4 (an inverse spinel), the tetrahedral sites hold one high-spin Fe^3+ and the octahedral sites hold one Fe^2+ and one Fe^3+ per formula unit. ... JEE Advanced level
A 3d-series ion of charge +3 has a spin-only magnetic moment of 5.92 BM. The ion is JEE Advanced level
Three solids X, Y and Z have the following band structures: X has a filled valence band, an empty conduction band and a gap of 0.7 eV; Y has a gap of 5.5 eV; Z ... JEE Advanced level
A paramagnetic salt obeys Curie's law, chi propto 1/T. Its magnetic susceptibility at 150 K is 8.0x10^-3 (SI, arbitrary units). Its susceptibility at 400 K is JEE Advanced level
Using the spin-only formula, which of the following ions have a magnetic moment greater than 3.0 BM? JEE Advanced level
Which of the following statements about magnetic ordering are correct? JEE Advanced level