NEET Physics Magnetic Properties of Materials MCQ Question
Consider a diagram showing a solenoid with a core material inside it. The diagram indicates that the magnetic field inside the solenoid is greater than B0. Which of the following best explains this increase in the magnetic field?
The core material has a non-zero magnetisation that adds to the solenoid's field.
The solenoid is wound with fewer turns per unit length, increasing the field.
The solenoid is connected to a higher voltage source, increasing the field.
The core material is removed, allowing more air to circulate inside the solenoid.
Correct Answer
Detailed Explanation
The magnetic field inside a solenoid with a material core is greater because the material's magnetisation adds to the field produced by the solenoid itself, as expressed by B = B0 + Bm.
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