The correct answer is: (D) Highly negative. A superconductor exhibits perfect diamagnetism, meaning it completely expels magnetic fields from its interior (Meissner effect). This results in a magnetic susceptibility of −1, which is highly negative, indicating a strong opposition to ...

The correct answer is: (D) Stationary charge. A stationary magnet does not interact with a stationary electric charge because magnetic fields affect only moving charges or magnetic materials. There is no magnetic force acting on a charge at rest, so ...

The correct answer is: (B) Less. The area of the B-H hysteresis loop for soft iron is less than that for steel, indicating lower energy loss during magnetization cycles. Soft iron is used in electromagnets due to its low hysteresis ...

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 ...

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 ...