SSC
PHYSICS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
A student tries to magnetise a short steel rod. Which of these tests will show that he has been successful?
|
|
Both ends of a permanent magnet attract the rod.
|
|
|
One end of a permanent magnet repels the rod.
|
|
|
The rod picks up a small piece of paper.
|
|
|
When freely suspended, the rod points in any direction.
|
Explanation:
Detailed explanation-1: -Magnetization by electrical method produces more powerful magnets than other magnetization methods. ∴ The electrical method is the most effective method of magnetization because it is much quicker than the other methods and produces strong magnets.
Detailed explanation-2: -Steel is preferred over soft iron for making permanent magnets, because coercivity of steel is larger.
Detailed explanation-3: -The Use of Steel in Permanent Magnets In its natural state, steel isn’t magnetic, but it can be modified in a way that turns it magnetic. When a nonmagnetic piece of steel is applied to a magnet, the atoms within it rearrange themselves in a manner that creates a permanent magnet.
There is 1 question to complete.