Advertisements
Advertisements
प्रश्न
Though Earth is acting as a huge bar magnet it is not attracting other ferromagnetic materials. Why? Give reasons.
उत्तर
Earth is not attracting other ferromagnetic materials because the magnetic character of ferromagnetic materials is affected by the external temperature. When they are heated, they become paramagnetic at curie temperature.
APPEARS IN
संबंधित प्रश्न
In which direction does a suspended bar magnet come to rest? Give reason.
Suggest one way to recognize the magnetic field of the earth.
Describe an experiment to illustrate that like poles repel while the, unlike poles, attract.
A small iron bar is kept near the north pole of a bar magnet. How does the iron bar acquire magnetism? Draw a diagram to show the polarity on the iron bar. What will happen if the magnet is removed?
Two like magnetic poles:
A charge of 75 C is brought from infinity to a given point in an electric field, when amount of work done is 3.75 J. Calculate the electrical potential at that point.
Define the magnetic field.
Define the magnetic meridian.
Consider the statement given below and choose the correct option.
Assertion: The Earth’s magnetic field is due to iron present in its core.
Reason: At a high temperature a magnet loses its magnetic property or magnetism.
What is the diameter of the magnetar?