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In the Activity shown below, how do we think the displacement of rod AB will be affected if current in rod AB is increased a stronger horse-shoe magnet is used and length of the rod AB is increased? - Science

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प्रश्न

In the Activity shown below, how do we think the displacement of rod AB will be affected if

  1. current in rod AB is increased
  2. a stronger horse-shoe magnet is used
  3. length of the rod AB is increased?
  • Take a small aluminium rod AB (of about 5 cm). Using two connecting wires suspend it horizontally from a stand, as shown in Fig.
  • Place a strong horse-shoe magnet in such a way that the rod lies between the two poles with the magnetic field directed upwards. For this put the north pole of the magnet vertically below and south pole vertically above the aluminium rod (Fig.).
  • Connect the aluminium rod in series with a battery, a key and a rheostat.
  • Now pass a current through the aluminium rod from end B to end A.
  • What do you observe? It is observed that the rod is displaced towards the left. You will notice that the rod gets displaced.
  • Reverse the direction of current flowing through the rod and observe the direction of its displacement. It is now towards the right.
  • Why does the rod get displaced?


A current-carrying rod, AB, experiences a force perpendicular to its length and the magnetic field. Support for the magnet is not shown here, for simplicity.

संक्षेप में उत्तर

उत्तर

A current-carrying conductor placed in a magnetic field experiences a force. The magnitude of force increases with the amount of current, strength of the magnetic field, and the length of the conductor. Hence, the magnetic force exerted on rod AB and its deflection will increase if,

  1. The current in rod AB is increased.
  2. A stronger horse-shoe magnet is used.
  3. Length of rod AB is increased.
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अध्याय 13: Magnetic Effects of Electric Current - Intext Questions [पृष्ठ २३२]

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एनसीईआरटी Science [English] Class 10
अध्याय 13 Magnetic Effects of Electric Current
Intext Questions | Q 2 | पृष्ठ २३२

वीडियो ट्यूटोरियलVIEW ALL [2]

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A student was asked to perform an experiment to study the force on a current carrying conductor in a magnetic field. He took a small aluminium rod AB, a strong horse shoe magnet, some connecting wires, a battery and a switch and connected them as shown. He observed that on passing current, the rod gets displaced. On reversing the direction of current, the direction of displacement also gets reversed. On the basis of your understanding of this phenomenon, answer the following questions: 

  1. Why does the rod get displaced on passing current through it?
  2. State the rule that determines the direction of the force on the conductor AB.
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    2. Name any two devices that use current carrying conductors and magnetic fields.

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