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If a charged particle is describing a circular path of radius r under the effect of perpendicular electric field, (i.e., motion of an electron around the nucleus of an atom) the force on the charged particle is……………..proportional to the …………..of radius of the circular path.

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The correct Answer is:
inversely, square
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PRADEEP-MAGNETIC EFFECT OF CURRENT AND MAGNETISM-Exercise
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  9. The magnetic field lines of a magnet form……………….loops unlike………………fiel...

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  10. According to Gauss's law for magnetism, …………………..through any closed su...

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  11. Magnetic inclination at a place is the angle which the……………………makes wi...

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  12. Isogonic lines are the lines joining places of…………………….. .

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  13. In the northern hemisphere, magnetic lines of force due to earth's fie...

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  14. At a particular place, horizontal and vertical components of earth's m...

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  15. Bohr magneton is the …………………. magnetic dipole moment associated with …...

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  16. Relative magnetic permeability of a material is defined as the ratio o...

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  17. Magnetic field strength, ………………., flux …………………represents the same quan...

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  18. SI units of magnetic permeability are …………………….., ……………………, …………………….....

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  19. Magnetic moment per unit volume of the material is called ……………. of th...

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  20. Intensity of magnetisation of a magnetic material is defined as ……………....

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