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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.
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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
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 clockwise ?
What is the direction of magnetic field at the centre of a coil carrying current in the anticlockwise direction?
Which of the statement given below correctly describes the magnetic field near a long, straight current carrying conductor?
Compare the magnetic field produced by a solenoid with the magnetic field of a bar magnet. Draw neat figures and name various components.
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)?
State and illustrate the rule used for finding the polarity of the faces of a circular coil.
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 ____________.
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.
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?
The correct pattern of magnetic field lines of the field produced by a current carrying circular loop is:
