Question 13 Marks
(a) Explain the mechanism by which unmagnetised iron nails get attracted to a magnet when brought near it.
(b) State any two properties of magnet.
(b) State any two properties of magnet.
Questions
[3 Mark Question Answer]
🎯
Test yourself on this topic
4 questions · timed · auto-graded
View full question & answer→
Question 23 Marks
1. Name the metal used for E and F.
2. Why are E and F placed in contact with the poles of the magnets as shown in the diagram?
3. Mark on the diagram the poles of the second magnet,
4. What is the material of darkened part?
2. Why are E and F placed in contact with the poles of the magnets as shown in the diagram?
3. Mark on the diagram the poles of the second magnet,
4. What is the material of darkened part?
Answer
View full question & answer→1. Soft iron is used for E and F.
2. E and F are placed in contact with the poles of magnets to preserve the strength of magnet.
3.
4. Darkened part is a non-magnetic material like wood.
2. E and F are placed in contact with the poles of magnets to preserve the strength of magnet.
3.
4. Darkened part is a non-magnetic material like wood.
Question 33 Marks
Define : Isogonic line, agonic line isoclinic line.
Answer
View full question & answer→Isogonic lines: A line which joins all the places on earth, having same angle of declination is called isogonic line.
Agonic line: A line which joins all the places on earth, having zero angle of declination is called agonic line.
Isoclinic line : A line joining all the places on globe, having same angle of dip or inclination is called isoclinic line.
Agonic line: A line which joins all the places on earth, having zero angle of declination is called agonic line.
Isoclinic line : A line joining all the places on globe, having same angle of dip or inclination is called isoclinic line.
Question 43 Marks
What do you meant by the term pole of a magnet? Magnetically speaking, what is the difference between a piece of brass, a piece of soft iron and a piece of lode-stone?
Answer
View full question & answer→Pole of a magnet: Each end of a bar magnet is called its pole. The point situated slightly inside a bar magnet, where most of its magnetic power is concentrated, is called magnetic pole or pole of a magnet.
Brass is not a magnetic substance and it is not affected by magnetic field. It does not stick to a magnet.
Soft iron is a ferromagnetic substance and gets strongly attracted towards a magnet. Soft iron can not attract other magnetic substances unless gets magnetised. Lode stone is naturally magnetized piece of mineral magnetite. It can attract other magnetic substance.
Brass is not a magnetic substance and it is not affected by magnetic field. It does not stick to a magnet.
Soft iron is a ferromagnetic substance and gets strongly attracted towards a magnet. Soft iron can not attract other magnetic substances unless gets magnetised. Lode stone is naturally magnetized piece of mineral magnetite. It can attract other magnetic substance.