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प्रश्न
State and illustrate the rule used for finding the polarity of the faces of a circular coil.
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.
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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?
Answer the following question:
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)?
An induced emf is produced when a magnet is moved into a coil. The magnitude of induced emf does not depend on ____________.
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:
Explain with the help of a labelled diagram the distribution of magnetic field due to a current through a circular loop. Why is it that if a current carrying coil has n turns the field produced at any point is n times as large as that produced by a single turn?
Explain the phenomenon of electromagnetic induction. Describe an experiment to show that a current is set up in a closed loop when an external magnetic field passing through the loop increases or decreases.
The correct pattern of magnetic field lines of the field produced by a current carrying circular loop is:
