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प्रश्न
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. Describe some salient features of magnetic lines of field concept.
उत्तर
In the absence of an external magnetic field, only Earth’s magnetic field acts due to which magnetic compass needle points north and south direction.
Current carrying loops behave like bar magnets and both have their associated lines of field. This modifies the already existing earth’s magnetic field and a deflection results.
The salient features of magnetic field lines are:
- Magnetic lines form closed and continuous curve.
- Magnetic lines emerge from north-pole to south-pole outside the magnet.
- Magnetic field lines never intersect each other.
- Closer magnetic lines represent a stronger magnetic field and vice-versa.
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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
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 clockwise ?
What is the direction of magnetic field at the centre of a coil carrying current in the anticlockwise direction?
Answer the following question.
Explain with the help of the pattern of magnetic field lines the distribution of the magnetic field due to a current-carrying a circular loop.
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:
The nature of magnetic field line passing through the centre of current carrying circular loop is ____________.
The correct pattern of magnetic field lines of the field produced by a current carrying circular loop is:
