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A magnetizing field of intensity 1600A//...

A magnetizing field of intensity `1600A//m` produces a magnetic flux of `2.5 xx10^-5` Wb in a bar of iron of cross-section `0.2 cm^2`. The permeability of the bar is

A

`7.5xx10^-4 TA^(-1)m`

B

`7.813xx10^-4 TA^(-1)m`

C

`7.5xx10^(-3) TA^+1m^(-1)`

D

`7.813xx10^3 TAm^-1`

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CHETANA PUBLICATION-Magnetic Materials-EXERCISE
  1. A rectangular magnet suspended freely has a period of oscillation equa...

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  2. The torque acting on a magnetie dipole of moment 5 A m^(2) when placed...

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  3. A magnetizing field of intensity 1600A//m produces a magnetic flux of ...

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  4. In order to have a strong electromagnet it must have

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  5. A bar magnet is demagnetized by inserting the inside a solenoid of len...

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  6. A paramagnetic material has 10^28 atom//m^3.Its magnetic susceptibilit...

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  7. The number of electrons flowing in a current carrying circular coil pe...

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  8. The correct relation between mu,mu0, x is

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  9. The net magnetic dipole moment per unit volume is known as

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  10. SI unit of intensity is

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  11. The Gyromagnetic Ratio is given by

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  12. Two substances A and B have their relative permeabilities slightly gre...

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  13. What isCurie temperature?

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  14. What is the effect of temperature on magnetization of paramagnetic mat...

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  15. Write a short note on electromagnets.

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  16. Define: Hysteresis

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  17. Define Retentivity

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  18. Find the value of Bohr magneton, given that e =1.6xx10^(-19)C, H = 6.6...

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  19. A short bar magnet placed with its axis at 30^@ with a uniform externa...

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  20. State the factors on which time period of angular oscillations depend ...

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