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Mention two properties of soft iron due ...

Mention two properties of soft iron due to which it is preferred for making electromagnet.

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Low Retentivity and high permeability.
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CBSE COMPLEMENTARY MATERIAL-UNIT–III & UNIT–IV MAGNETIC EFFECTS OF CURRENT AND MAGNETISM & E.M.I. AND ALTERNATING CURRENT-SHORT ANSWER QUESTIONS (2 Marks)
  1. A current of 10A flows through a semicircular wire of radius 2 cm as s...

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  2. A proton an an alpha-particle, moving with the same velocity, enter a ...

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  3. Mention two properties of soft iron due to which it is preferred for m...

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  4. A magnetic dipole of magnetic moment M is kept in a magnetic field B. ...

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  5. (a) What happens if a bar magnet is cut into two pieces : (i) transver...

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  6. A steady current I flows along an infinitely long straight wire with c...

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  7. A circular coil of n turns and radius R carries a current I. It is unw...

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  8. A coil of N turns and radius R carries a current I. It is unwound and ...

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  9. At a place horizontal component of the earths magnetic field is B and ...

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  10. A galvanometer coil has a resistance G. 1% of the total current goes t...

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  11. Prove that magnetic moment of a hydrogen atom in its ground state is e...

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  12. Each of conductors shown in figure carries 2A of current into or out o...

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  13. What is the radius of the path of an electron (mass 9 xx 10^(-31) kg a...

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  14. Why is it necessary for voltmeter to have a higher resistance?

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  15. A DC ammeter cannot measure alternating current because

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  16. Define the term: magnetic dipole moment of a current loop. Write the e...

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  17. An ac source of rms voltage V is put across a series combination of an...

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  18. A bar magnet is falling with some acceleration ‘a’ along the vertical ...

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  19. The series L–C–R circuit shown in fig. is in resonance state. What is ...

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  20. The division marked on the scale of an a.c. ammeter are not equally sp...

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