Which of the following does not get demagnetised when a powerful magnet is kept near ita)CDb)music systemc)Cell phoned)CombCorrect answer is option 'D'. Can you explain this answer?

Question

Answer

The correct answer is D as COMB does not get demagnetised when a powerful magnet is kept near it

Answer

As comb doesn't include any magnetic material so magnets have no effect on comb

Answer

Introduction:
When a powerful magnet is kept near certain objects, they can become demagnetized. However, there are some objects that are not affected by the magnet and remain magnetized. In this case, the correct answer is option 'D', which states that a comb does not get demagnetized when a powerful magnet is kept near it.

Explanation:
To understand why a comb does not get demagnetized, we need to consider the properties of the materials used to make the comb and how they interact with magnetic fields.

1. Material Composition:
Combs are typically made of non-magnetic materials such as plastic, wood, or bone. These materials do not contain magnetic elements like iron, nickel, or cobalt, which are susceptible to magnetism.

2. Magnetic Permeability:
The ability of a material to become magnetized in the presence of a magnetic field is known as magnetic permeability. Non-magnetic materials like plastic, wood, and bone have low magnetic permeability, which means they are not easily affected by magnetic fields.

3. Magnetic Field Interaction:
When a powerful magnet is brought near an object, it creates a magnetic field around itself. This magnetic field can induce magnetism in objects that are susceptible to magnetism, such as iron or certain metals. However, non-magnetic materials like plastic, wood, and bone do not interact strongly with magnetic fields and therefore do not become magnetized.

4. Demagnetization Process:
For an object to become demagnetized, it needs to be subjected to an opposing magnetic field that neutralizes its magnetism. Since the comb is not initially magnetized and does not interact strongly with magnetic fields, it does not require demagnetization when a powerful magnet is brought nearby.

Conclusion:
In summary, a comb does not get demagnetized when a powerful magnet is kept near it because it is made of non-magnetic materials with low magnetic permeability. The absence of magnetic elements and the weak interaction with magnetic fields make the comb unaffected by the magnet's influence.

Top Courses for Class 6View all

Science for Class 6

Mathematics for Class 6

Social Studies for Class 6

English Grammar for Class 6

English for Class 6

Top Courses for Class 6

Top Courses for Class 6

Related Content

Class 6 Study Material

Class 6 Subjects

Competitive Examinations for Class 6

NCERT Books

NCERT Solutions

Reference Books for Class 6

Other Popular Exams

Company