The relative permeability of a ferromagnetic material is MCQ with Answer and Explanation

Question Report Error

The relative permeability of a ferromagnetic material is

A. Very large

B. Slightly less than 1

C. Exactly 1

D. Slightly greater than 1

Answer: Option A

Solution (By JKExamLibrary)

Ferromagnetic materials have μ_r >> 1 (hundreds to thousands). Paramagnetic slightly >1, diamagnetic

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1 Report Error

The energy of SHM when particle is at mean position is

A. All potential

B. All kinetic

C. Half KE half PE

D. Zero

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Correct Answer: Option B

Explanation:
At mean position, velocity maximum, displacement zero, all energy is kinetic.

This question belongs to: Science Physics

Question #2 Report Error

A ball is dropped from a height of 20 m. Time to reach ground (g=10) is

A. 3 s

B. 1 s

C. 2 s

D. 4 s

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Correct Answer: Option C

Explanation:
h = ½gt² => t = √(2h/g) = √(40/10) = √4 = 2 s. Free fall formula. Final velocity v = gt = 20 m/s.

This question belongs to: Science Physics

Question #3 Report Error

A lactometer measures

A. Viscosity of milk

B. Density of milk

C. Purity of milk

D. Temperature of milk

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Correct Answer: Option C

Explanation:
Lactometer is a type of hydrometer used to check purity of milk by measuring specific gravity. Adulteration with water lowers density. It doesn't measure temperature or viscosity directly.

This question belongs to: Science Physics

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