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An iron nail near a bar magnet experienc...

An iron nail near a bar magnet experiences

A

Only torque

B

Torque and force of attraction

C

Only force

D

Torque and force of repulsion

Text Solution

Verified by Experts

The correct Answer is:
C
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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 - A Objective Type Questions (One option is correct)
  1. Maxwell's equation oint vecB * d vecs = 0 says

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  2. A permanent magnet attracts

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  3. A toroid has/have

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  4. In the figure here a paramagnetic sphere is located near south pole of...

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  5. In the figure here a diamagnetic sphere is kept near the bar magnet . ...

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  6. Area under this given curve gives

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  7. The materials for the construction of electromagnet should have

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  8. Magnetic dip was measured at various places on earth in one of the fol...

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  9. Two identical short bar magnets at a distance d(1) = 2 m apart are pl...

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  10. In tangent galvanometer generally for more accuracy deflection of galv...

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  11. In tan A position two short bar magnets of magnetic moments in ratio o...

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  12. Two similar magnets of magnetic moments M(1) and M(2) are taken and vi...

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  13. The arms of a deflection magnetometer in tangent B position are placed...

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  14. A deflection magnetometer is adjusted in the usual way . When a magnet...

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  15. An iron nail near a bar magnet experiences

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  16. What is the basic use of hysteresis curve?

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  17. Intensity of magnetisation is

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  18. Dipole moment of earth is order of the

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  19. Which of the following statements is correct ?

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  20. Variation of mu(r) (relative permeability) with magnetizing field as s...

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