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Which one of the following is not made o...

Which one of the following is not made of soft iron ?

A

electromagnet

B

core of transformer

C

core of dynamo

D

magnet of loudspeaker

Text Solution

Verified by Experts

The correct Answer is:
A, D
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FULL MARKS-MAGNETISM AND MAGNETIC EFFECTS OF ELECTRIC CURRENT -ADDITIONAL QUESTIONS SOLVED
  1. Magnetic permeability is maximum for

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  2. The material of a permanent magnet has

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  3. Which one of the following is not made of soft iron ?

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  4. A dip circle is at right angles to the magnetic meridian. The apparent...

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  5. A magnetic needle is placed in a uniform magnetic field. It experienec...

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  6. Relative permeability of iron is 5500. Its magnetic susceptibility is

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  7. The inherent property of all matter is

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  8. A magnetic needle suspended freely

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  9. The earth's magnetic field at a given point is 0.5 xx 10^(-5) Wb m^(2)...

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  10. A frog can be leviated in a magnetic field produced by a current in a ...

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  11. The magnetic moment of a current carrying circular coil of radius r va...

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  12. For a paramagnetic material, the dependence of the magnetic susceptibi...

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  13. A charged paticle (charge q ) is moving in a circle of radius R with u...

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  14. Nickel shows ferromagnetic property at room temperature. If the temper...

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  15. A proton enters a magnetic field of flux density 1.5 Wb/m^(2) with a s...

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  16. A moving charge produces

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  17. A straight conductor carrying a current I, is split into a circular lo...

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  18. In a moving coil galvanometer the current 'I' is related to the deflec...

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  19. The magnetic moment of a current carrying circular coil of radius r va...

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  20. A moving charge is subjected to an external magnetic field. The change...

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