The correct answer is: (B) Broad hysteresis loop. Permanent magnetic materials have a broad hysteresis loop, indicating high retentivity and coercivity. This allows them to retain magnetism for a long time. Such materials are also generally hard and used in ...
Category: Class 12 Physics
NCERT Solutions for Class 12 Physics updated for CBSE academic session 2021-2022.
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The correct answer is: (A) Slightly less. When a diamagnetic material is placed in a magnetic field, it creates a weak magnetic field in the opposite direction. This opposes the external field, making the net magnetic field inside the material ...
The correct answer is: (D) Copper. Copper is a diamagnetic material, meaning it is weakly repelled by a magnetic field. Unlike ferromagnetic materials like iron, cobalt and steel, diamagnetic substances do not retain magnetism and exhibit only a very weak, ...
The correct statement is: (D) Tangent at a point on every field line gives the direction of magnetic field at that point. Magnetic field lines are continuous closed loops and never intersect each other. They represent both the direction and ...
Horizontal component BH = B cosδ. Given: BH 0.2G, B = 0.4G So, cosδ = 0.2/0.4 = 0.5 δ = cos⁻¹ (0.5) = 60°. Answer: (C) 60°.