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प्रश्न
State and illustrate the rule used for finding the polarity of the faces of a circular coil.
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उत्तर
For finding the polarity of the two faces of a current-carrying circular coil, the following rule applies:
When an observer, looking at the circular coil, finds the current to be flowing in the anti-clockwise direction, then the face of the coil behaves like the N-pole of the equivalent magnet. On the other hand, if the current is seen to flow in the clockwise direction, then the face of the coil behaves like the S-pole of the equivalent magnet.
संबंधित प्रश्न
The back face of a circular loop of wire is found to be south magnetic pole. The direction of current in this face of the circular loop of wire will be:
(a) towards south
(b) clockwise
(c) anticlockwise
(d) towards north
Draw a labelled diagram showing the three magnetic field lines of a loop carrying current. Mark the direction of current and the direction of magnetic field by arrows in your diagram.
A wire, bent into a circle, carries current in an anticlockwise direction. What polarity does this face of the coil exhibit?
What is the direction of magnetic field at the centre of a coil carrying current in the anticlockwise direction?
Compare the magnetic field produced by a solenoid with the magnetic field of a bar magnet. Draw neat figures and name various components.
Why is it that the magnetic field of a current-carrying coil having n turns, is ‘n’ times as large as that produced by a single turn (loop)?
If two circular coils can be arranged in any of the three situations as shown in the diagrams below, then their mutual induction will be:
Meena draws magnetic field lines of field close to the axis of a current carrying circular loop. As she moves away from the centre of the circular loop she observes that the lines keep on diverging.
How will you explain her observation.
Why does a magnetic compass needle pointing North and South in the absence of a nearby magnet get deflected when a bar magnet or a current carrying loop is brought near it.
The correct pattern of magnetic field lines of the field produced by a current carrying circular loop is:
