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If the magnetising field on a ferromagnetic material is increased, its permeability
Options
(a) decrease
(b) increase
(c) is unaffected
(d) may be increase or decrease
Correct Answer:
decrease
Explanation:
Magnetic permeability of substance, μ = B / H ⇒ μ ∝ 1/H
where, H is the magnetising or magnetic field strength.
So, the magnetising field of a ferromagnetic material is increasing thus its, permeability decreased.
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Topics: Magnetic Effects of Current and Magnetism
(167)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- At what height h above earth, the value of g becomes g/2 (where R=radius of earth)?
- The wavelength of first line of Balmer series is 6563Å. The wavelength of first line
- Photoelectric emision occurs only when the incident light has more than a certain minimum
- The radius of the first orbit of the hydrogen atom is a₀. The radius of the second orbit
- A Carnot engine takes heat from a reservoir at 627⁰C and rejects heat
Topics: Magnetic Effects of Current and Magnetism (167)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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