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प्रश्न
Earth acts as a huge bar magnet. Why? Give reasons.
उत्तर
- A freely suspended magnetic needle at a point on the Earth comes to rest approximately along the geographical north–south direction.
- This shows that the Earth behaves like a huge magnetic dipole with its magnetic poles located near its geographical poles.
- The north pole of a magnetic needle approximately points towards the geographic north (NG).
- The magnetic north pole of the needle is attracted by the magnetic south pole of the Earth (Sm), which is located at the geographic north NG.
- Also, the magnetic south pole of the needle is attracted by the magnetic north pole of the Earth (Nm), which is located at the geographic south SG.
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संबंधित प्रश्न
Fill in the blank.
A magnet has ............. poles.
Fill in the blank.
The north pole of the imaginary magnet of the earth is near the geographic ................. pole.
State if the following statement is true or false. Correct the statement if it is false.
If a bar magnet is cut in two pieces, then one piece will have only the north pole and the other will have only the south pole.
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 25 C is moved from infinity to points A and B in an electric field when the work is done to do so is 10 J and 10.5 J respectively. Calculate the potential difference between points A and B.
Select the correct option:
SI unit potential difference is:
A freely suspended bar magnet is always pointing along the ________ north-south direction.
Write a note on Earth’s magnetism.
What is the diameter of the magnetar?
