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What is 'retentivity' in magnetism ?...

What is 'retentivity' in magnetism ?

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The property of a material to retain the magnetism even after the removal of the magnetising field is known as retentivity.
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SUBHASH PUBLICATION-SUPPLEMENTARY EXAM QUESTION PAPER JUNE 2018-QUESTION
  1. Define current sensitivity of a moving coil galvanometer.

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  2. Write the expression for force experienced by a straight conductor of ...

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  3. What is 'retentivity' in magnetism ?

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  4. Where on the earth.s surface is the magnetic dip zero ?

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  5. State Lenz's law.

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  6. Write the condition for .resonance. of series LCR circuit.

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  7. What is wattless current?

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  8. A blue ray of light enters an optically denser medium from air. What h...

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  9. ""(92)U^(238) undergoes alpha-decay giving rise to thorium. What is th...

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  10. Represent graphically the variation of resistivity with absolute tempe...

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  11. Write an expression for cyclotron frequency and explain the terms .

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  12. State and explain 'Curie's Law' in magnetism .

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  13. Mention any two factors on which the self inductance of a coil depends...

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  14. Give any two applications of ultraviolet radiations.

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  15. What is polarisation of light ? Name any one method of producing plane...

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  16. Calculate de Broglie wavelength associated with an electron moving wit...

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  17. Write any two advantages of Light Emitting Diode (LED) over convention...

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  18. Write any three properties of magnetic field lines.

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  19. Obtain an expression for effective Capacitance of two Capacitors Conne...

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  20. Distinguish between diamagnetic and paramagnetic substances.

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