The magnetisation at the centre of a bar magnet (magnetic length 10 cm), having pole strength 6.3 A m, and area of cross-section \(A = 0.70 \text{ cm}^2\) is

Select scalar quantities from the following:
A. electric flux
B. Electric current
C. Current density
D. Electromagnetic force
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The drift velocity of electrons in a copper wire of length 2 m under the application of a potential difference of 200 V is \( 0.5 \text{ ms}^{-1} \). The mobility of electrons in \( \text{m}^2\text{V}^{-1}\text{s}^{-1} \) is :

A transmitting station transmits radio waves of wavelength 300 m. The inductance of the coil required with a capacitor of capacity 1.0 \( \mu F \) in a resonant circuit will be

The loss of strength of a signal while propagating through a medium is called-

Choose the correct answer statements from the following:
A. Magnetic field lines due to a straight wire carrying current, are circles concentric with the wire.
B. Bohr magneton is the maximum value of the magnetic moment of an electron moving around the central nucleus.
C. Ampere's circuital law is not independent of Biot-savart law.
D. Dip is the angle that the total magnetic field of the earth makes with the surface of the earth.
choose the correct answer from the options given below:

The capacitance of a capacitor becomes \( \frac{9}{7} \) times of its original value when a dielectric slab of thickness \( t = \frac{d}{4} \) is inserted between the plates, where d is the separation between the plates. The dielectric constant of the slab is

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In the formation of coordination complexes, if the inner \(d\) orbital \((n - 1)d\) is used in hybridisation, the complex, is called an inner orbital or low spin or spin paired complex. And if it uses outer \(d\) orbital \((nd)\) in hybridisation (like \(sp^3d^2\)), it is called outer orbital or high spin or spin free complex. The degeneracy of the \(d\) orbitals has been removed due to ligand electron-metal electron repulsions in the complex. This splitting of the degenerate levels due to the presence of ligands in a definite geometry is termed as crystal field splitting. For coordination complexes, the magnetic moment is determined by the number of unpaired electrons and is calculated by using the 'spin-only' formula, \(\mu = \sqrt{n(n+2)}\) where \(n\) is the number of unpaired electrons and \(\mu\) is the magnetic moment in units of Bohr magneton \((BM)\). The coordination compounds are of great importance. These compounds are widely present in the mineral, plant and animal worlds and are known to play many important functions in the area of analytical chemistry, metallurgy, biological systems, industry and medicine.
The \(CFSE\) for tetrahedral \([CoCl_4]^{2-}\) is \(8000\ cm^{-1}\), the \(CFSE\) for octahedral \([CoCl_6]^{4-}\) will be__________

Meiotic division of the secondary oocyte takes place in the:

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The coordination compounds are of great importance. These compounds are widely present in the mineral, plants and animal world and are known to play many important functions in the area of analytical chemistry, metallurgy, biological systems, industry and medicine. For example, coordination compounds find use in many qualitative and quantitative chemical analysis. Some important metal extraction and purification make use of complex formation. Hardness of water can be estimated by stable complex formation of Ca\(^{2+}\) and Mg\(^{2+}\)
In photography undecomposed AgBr is removed as ___________

Two nuclei with mass numbers A and B have density ratios of :

The capacity of a parallel plate capacitor does not depend on :

If a line makes angles \(\alpha, \beta\) and \(\gamma\) with the positive directions of coordinate axes respectively, then \(\cos 2 \alpha+\cos 2 \beta+\cos 2 \gamma\) is equal to