Tag: magnetism and matter

Quizzes (4) Questions (67)

Questions Related to magnetism and matter

Multiple choice physics magnetism and matter paramagnetic material classification of magnetic material magnetism

A paramagnetic substance when placed in an externally applied non-uniform magnetic field tends to ___________.

  1. increase the applied field

  2. decrease the applied field

  3. vary the applied field

  4. change the applied field
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Paramagnetic substances are the substances which are feebly attracted by a magnet. When a non-uniform external magnetic field is applied to a paramagnetic substance the magnetic field tries to aligned the magnetic moment in the direction of the field 

Completely alignment is however not possible, on account of thermal vibration. A better allingement can be achieved by increasing the strength of the applied magnetic field.

 

Multiple choice physics magnetism and matter paramagnetic material classification of magnetic material magnetism

When the atomic magnetic moments are randomly oriented in a solid its magnetic behavior is termed as

  1. semi-magnetic.

  2. anti-ferromagnetic.

  3. paramagnetic.

  4. poly crystalline.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When the atomic magnetic moments are randomly oriented in a solid its magnetic behavior is termed as paramagnetic.in paramagnetism electrons are unpaired.

Multiple choice physics magnetism and matter paramagnetic material classification of magnetic material magnetism

Liquid oxygen remains suspended between two pole forces of a magnet because it is:

  1. diamagnetic

  2. paramagnetic

  3. ferromagnetic

  4. antiferromagnetic
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Oxygen is paramagnetic in nature. So if it will be attracted both by North pole or South pole. When it is placed exactly between two magnetic poles, the forces acting on it due to magnetic poles will be equal & opposite. Hence it will remain suspended between them.

Multiple choice physics magnetism and matter paramagnetic material classification of magnetic material magnetism

A substance is placed in a non uniform magnetic field. It experiences weak force towards the strong field. The substance is _________ type.

  1. Ferromagnetic

  2. Diamagnetic

  3. Paramagnetic

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Paramagnetic substance has the property that when they are placed in an external magnetic field, they get weakly magnetised in the same direction as that of external magnetic field and are weakly attracted by the external magnetic field.
So, correct answer is option C.

Multiple choice physics magnetism and matter magnetic materials behaviour of substances in magnetic field classification of magnetic materials

Assertion : When diamagnetic material is placed in a non-uniform magnetic field, it tends to move from stronger to the weaker part of the magnetic field.
Reason : Diamagnetic materials possess strong magnetism.

  1. If both assertion and reason are true and reason is the correct explanation of assertion.

  2. If both assertion and reason are true and reason is not the correct explanation of assertion.

  3. If assertion is true but reason is false.

  4. If both assertion and reason are false.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Electrons is an atom orbiting around nucleus possess orbital angular momentum. These orbiting electrons are equivalent to current-carrying loop and thus possess orbital magnetic moment. Diamagnetic substances are the ones in which resultant magnetic moment in an atom is zero. When magnetic field is applied, those electrons having orbital magnetic moment in the same direction slow down and those in the opposite direction speed up. Thus, the substance develops a net magnetic moment in direction opposite to that of the applied field.

Multiple choice physics magnetism and matter magnetic materials behaviour of substances in magnetic field classification of magnetic materials

Assertion : At high temperature, a ferromagnet becomes a paramagnet.
Reason : The ferromagnetic property depends on temperature.

  1. If both assertion and reason are true and reason is the correct explanation of assertion.

  2. If both assertion and reason are true and reason is not the correct explanation of assertion.

  3. If assertion is true but reason is false.

  4. If both assertion and reason are false.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

At enough high temperature, a ferromagnet become a paramagnet. The domain structure disintegrates with temperature.