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IT IS ALL ABOUT MAGNETIC FIELD DUE TO A CURRENT CARRYING CONDUCTOR

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  1. MAGNETIC FIELD DUE TO A CURRENT CARRYING  CONDUCTOR NAME : DAIFA AYESHA CLASS : 10 A5 SUBJECT : SCIENCE (PHYSICS) GR NO : 59380

  2. MAGNETIC FIELD DUE TO CURRENT CARRYING CONDUCTOR.  If a magnetic compass is placed near a conductor carrying current (wire), the needle is deflected. This shows that a conductor carrying current has a magnetic field around it.  If the direction of the current is from north to south, the deflection of the magnetic needle is towards the east.  If the direction of the current is from south to north, the deflection of the needle is towards the west. The magnetic field around a current carrying straight conductor is in concentric circles. It can be observed by passing a current carrying straight conductor through a cardboard and sprinkling iron filings on it.

  3. 1) MAGNETIC FIELD DUE TO A CURRENT THROUGH A STRAIGHT CONDUCTOR : In the above figures, note that there are current carrying conductors in opposite directions. In both cases, the current carrying conductor is intercepted by a cardboard placed at right angles to the current carrying conductor.

  4. There are some iron fillings sprinkled on the conductor. When current flows through the conductor, the iron filing arrange themselves along the magnetic field. We can see that the magnetic field in both cases is in opposite directions as is the current. The magnetic field produced by a current-carrying straight wire depends inversely on the distance from it and directly on the current passing through it. From this we see that the current carrying conductor produces a magnetic field around it. The direction of this magnetic field is given by Right Hand Thumb Rule.

  5. Right Hand Thumb Rule Suppose that you are holding a current-carrying straight conductor in your right hand such that the thumb points towards the direction of flow of current. Then, your fingers which wrap around the conductor indicate the direction of magnetic field lines (as shown in the figure)

  6. Magnetic Field in a Circular Carrying conductor At every point of current-carrying circular conductor, the magnetic field is in the form of concentric circles as represented above. The circles are concentric in nature with increasing diameters as the move farther from the current carrying wire. At the centre of the circular loop, the circles appear like straight lines. The magnetic field produced by a current-carrying straight wire depends inversely on the distance from it and directly on the current passing through it. The Right Hand Thumb Rule is applicable here at every point of the current carrying conductor

  7. Magnetic Field due to Current in a Solenoid A coil with many circular close turns of insulated copper wire (like a cylinder as shown above) is a solenoid. One end of such a solenoid behaves like the north pole and the other as a south pole. Therefore magnetic field due to current in the solenoid is similar to a bar magnet. The fields always emerge out of the North pole and always merge into the South pole

  8. The field inside the solenoid is uniform. The strong magnetic field inside the solenoid is so strong that it can be used to magnetize a piece of soft iron when it is placed inside the coil. The magnet formed like this is called a Electromagnet

  9. THANK YOU

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