A metallic rod when placed in strong magnetic field, aligns itself at right angles to the magnetic field. The nature of material is:
Diamagnetic
Understanding Magnetic Material Behavior
When different types of materials are placed in a strong magnetic field, they interact with the field in specific ways. This interaction, particularly how the material aligns itself relative to the magnetic field lines, helps us determine the nature of the material.
Types of Magnetic Materials and Their Alignment
Let's consider the three main types of magnetic materials:
- Paramagnetic Materials: These materials are weakly attracted by a magnetic field. When placed in a strong magnetic field, they tend to align themselves weakly in the direction of the applied magnetic field. They move from weaker to stronger parts of the field.
- Ferromagnetic Materials: These materials are strongly attracted by a magnetic field. They align themselves strongly in the direction of the applied magnetic field and are easily magnetized. They also move from weaker to stronger parts of the field.
- Diamagnetic Materials: These materials are weakly repelled by a magnetic field. When placed in a strong magnetic field, they tend to align themselves at right angles, or perpendicular, to the direction of the applied magnetic field. They move from stronger to weaker parts of the field.
Analyzing the Metallic Rod's Alignment
The question states that the metallic rod, when placed in a strong magnetic field, aligns itself at right angles to the magnetic field. This specific behavior—aligning perpendicular to the field—is characteristic of diamagnetic substances.
Let's summarize the alignment behavior:
| Material Type | Interaction with Field | Alignment in Strong Field |
|---|---|---|
| Paramagnetic | Weak attraction | Parallel to field |
| Ferromagnetic | Strong attraction | Parallel to field |
| Diamagnetic | Weak repulsion | Perpendicular (at right angles) to field |
Since the metallic rod aligns itself at right angles to the magnetic field, its nature must be diamagnetic.
Important Questions from Magnetism and Maxwell's Equations
- Which type of magnetic material is characterized by an induced magnetic moment that consistently opposes the applied external magnetic field, resulting in a small, negative volume magnetic susceptibility ($\chi_v$)?
The Curie temperature for cobalt is:
Identify which of the following expressions is not Maxwell’s equation for time-varying fields.
Which of the following materials is used for the generation of ultrasonic waves by using magnetostriction effect?
Ampere circuital law can be expressed as:
