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An iron nail near a bar magnet experienc...

An iron nail near a bar magnet experiences

A

One torque

B

Torque and force of attraction

C

Only force

D

Torque and force of repulsion

Text Solution

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The correct Answer is:
B
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(a) What happens if a bar magnet is cut into two pieces (i) transverse to its length (ii) along its length? (b) What happens if an iron bar magnet is melted? Does it retain its magnetism? (c) A magnetized needle in a uniform magnetic field experiences a torque but no net force. However, an iron nail near a bar magnet experiences a force of attraction in addition to a torque, explain. (d) Must every magnetic field configuration have a north pole and a south pole? What about the field due to a toroid? (e) Can you think of magnetic field configuration with three poles? (f) Two identical looking iron bars A and B are given, one of which is definitely known to be magnetized. How would one ascertain whether or not both are magnetized? If only one is magnetized how does one ascertain which one? Use nothing else but the bars A and B.

A: A magnetize needle in a uniform magnetic field experiences a torque but no net force, however, an iron hail near a bar magnet experiences a force of attraction as well as torque. R: Bar magnet creates non-uniform magnetic field.

Manish was given aqueous solutions of silver nitrate, zinc sulphate and an iron nail. In the first experiment, he dipped iron nail in silver nitrate solution and observed that the solution turned brown. In second experiment, he dipped iron nail in zinc sulphate solution. However, no change was observed. Based on the above information, answer the following questions. Why did solution tum brown in the first experiment?

Manish was given aqueous solutions of silver nitrate, zinc sulphate and an iron nail. In the first experiment, he dipped iron nail in silver nitrate solution and observed that the solution turned brown. In second experiment, he dipped iron nail in zinc sulphate solution. However, no change was observed. Based on the above information, answer the following questions. Name the type of reaction that occurs when iron reacts with AgNO_3 solution.

Manish was given aqueous solutions of silver nitrate, zinc sulphate and an iron nail. In the first experiment, he dipped iron nail in silver nitrate solution and observed that the solution turned brown. In second experiment, he dipped iron nail in zinc sulphate solution. However, no change was observed. Based on the above information, answer the following questions. If he adds zinc strip in ferrous sulphate solution, what colour change will he observe?

Manish was given aqueous solutions of silver nitrate, zinc sulphate and an iron nail. In the first experiment, he dipped iron nail in silver nitrate solution and observed that the solution turned brown. In second experiment, he dipped iron nail in zinc sulphate solution. However, no change was observed. Based on the above information, answer the following questions. Based on your observation, arrange Ag, Zn and Fe in decreasing order of their reactivity.

Manish was given aqueous solutions of silver nitrate, zinc sulphate and an iron nail. In the first experiment, he dipped iron nail in silver nitrate solution and observed that the solution turned brown. In second experiment, he dipped iron nail in zinc sulphate solution. However, no change was observed. Based on the above information, answer the following questions. Will silver react with zinc sulphate solution?

AAKASH INSTITUTE-MAGNETISM AND MATTER -ASSIGNMENT (SECTION C)
  1. The magnetic moment of a diamagnetic atom is

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  2. A thin ring of radius R metre has charge q coulomb uniformly spread ...

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  3. A bar magnet having a magnetic moment of 2 xx 10 ^(4) JT ^(-1) is free...

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  4. If a diamagnetic substance is brought near the north or the south pole...

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  5. Curie temperature is the temperature above which

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

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  7. Above curie temperature

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  8. If the magnetic dipole of moment of an atom of diamagnetic material, p...

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  9. A bar magnet having a magnetic moment of 2xx10^(4) JT^(-1) is free to ...

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  10. A bar magnet of magnetic moment vec(M) is placed in a magnetic field o...

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  11. Tangent galvanometer is used to measure

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  12. The work done in turning a magnet of magnetic moment 'M' by an angle o...

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  13. Due to the earth's magnetic field, charged cosmic ray particles

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  14. For protecting a sensitive equipment from the external magnetic field,...

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  15. Two bar magnets having same geometry with magnetic moments M and 2M, a...

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  16. According to Curie's law, the magnetic susceptibilty of a paramagneti...

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  17. A diamagnetic material in a magnetic field moves

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  18. If the magnetic dipole of moment of an atom of diamagnetic material, p...

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  19. A current loop in a magnetic field

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  20. An iron nail near a bar magnet experiences

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