Hysteresis, Soft Iron vs Steel & Shielding: Magnetic Properties of Materials PYQs (MHT CET, JEE Main, NEET)

Q1MHT CET 2026 · 19 MAY · SHIFT 2Easy

Hysteresis, Soft Iron vs Steel & Shielding · Soft iron vs steel: choice of material

Soft iron is used in making an electromagnet because

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Answer: (d)

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Q2MHT CET 2025 · 22 APR · SHIFT 2Easy

Hysteresis, Soft Iron vs Steel & Shielding · Hysteresis curve: retentivity & coercivity

Magnetic hysteresis is exhibited by magnetic materials which are

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Answer: (c)

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Q3MHT CET 2025 · 25 APR · SHIFT 2Easy

Hysteresis, Soft Iron vs Steel & Shielding · Magnetic shielding

To protect the instrument from magnetic field, it is completely surrounded by

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Answer: (a)

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Q4MHT CET 2024 · 10 MAY · SHIFT 1Easy

Hysteresis, Soft Iron vs Steel & Shielding · Hysteresis curve: retentivity & coercivity

In the following graph of flux density versus magnetizing force, coercivity and retentivity are respectively represented by the points

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Answer: (a)

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Q5JEE Main 2024 · 8 APR · SHIFT 2Easy

Hysteresis, Soft Iron vs Steel & Shielding · Demagnetising current

The coercivity of a magnet is $5 \times 10^{3}\text{ A/m}$ . The amount of current required to be passed in a solenoid of length $30\text{ cm}$ and the number of turns 150, so that the magnet gets demagnetised when inside the solenoid is ________ A.

Numerical answer type. Work it out, then open the answer.

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Answer: 10

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Q6MHT CET 2023 · 14 MAY · SHIFT 2Easy

Hysteresis, Soft Iron vs Steel & Shielding · Hysteresis curve: retentivity & coercivity

In the hysteresis curve the value of magnetization (B) which will be present in a substance when value of magnetizing force $(\mathrm{H})$ is made zero $(\mathrm{H} = 0)$ is called as

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Answer: (b)

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Q7JEE Main 2023 · 10 APR · SHIFT 1Easy

Hysteresis, Soft Iron vs Steel & Shielding · Demagnetising current

The current required to be passed through a solenoid of 15 cm length and 60 turns in order of demagnetise a bar magnet of magnetic intensity $2.4 \times 10^{3}\text{ Am}^{-1}$ is ___________ A.

Numerical answer type. Work it out, then open the answer.

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Answer: 6

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Q8MHT CET 2023 · 9 MAY · SHIFT 1Easy

Hysteresis, Soft Iron vs Steel & Shielding · Soft iron vs steel: choice of material

The materials suitable for making electromagnets should have

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Answer: (b)

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Q9JEE Main 2023 · 8 APR · SHIFT 2Easy

Hysteresis, Soft Iron vs Steel & Shielding · Soft iron vs steel: choice of material

Given below are two statements: one is labelled as Assertion $\mathbf{A}$ and the other is labelled as Reason $\mathbf{R}$

Assertion A: Electromagnets are made of soft iron.

Reason R: Soft iron has high permeability and low retentivity.

In the light of above, statements, choose the most appropriate answer from the options given below.

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Answer: (a)

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Q10MHT CET 2023 · 13 MAY · SHIFT 2Easy

Hysteresis, Soft Iron vs Steel & Shielding · Magnetic shielding

Magnetic shielding is done by surrounding the instrument to be protected from magnetic field by

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Answer: (a)

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Q11JEE Main 2022 · 24 JUN · SHIFT 2Easy

Hysteresis, Soft Iron vs Steel & Shielding · Soft iron vs steel: choice of material

The soft-iron is a suitable material for making an electromagnet. This is because soft-iron has

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Answer: (c)

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Q12JEE Main 2020 · 7 JAN · SHIFT 2EasyOld syllabus

Hysteresis, Soft Iron vs Steel & Shielding · Hysteresis curve: retentivity & coercivity

The figure gives experimentally measured B vs H variation in a ferromagnetic material. The retentivity, coercivity and saturation, respectively, of the material are:

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Answer: (a)

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Q13JEE Main 2020 · 2 SEP · SHIFT 1EasyOld syllabus

Hysteresis, Soft Iron vs Steel & Shielding · Soft iron vs steel: choice of material

Magnetic materials used for making permanent magnets (P) and magnets in a transformer (T) have different properties of the following, which property best matches for the type of magnet required?

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Answer: (b)

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Q14JEE Main 2019 · 9 JAN · SHIFT 1Easy

Hysteresis, Soft Iron vs Steel & Shielding · Demagnetising current

A bar magnet is demagnetized by inserting it inside a solenoid of length 0.2 m, 100 turns, and carrying a current of 5.2 A. The coercivity of the bar magnet is:

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Answer: (b)

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Q15JEE Main 2018 · 15 APR · SHIFT 1Medium

Hysteresis, Soft Iron vs Steel & Shielding · Demagnetising current

The $B\text{-}H$ curve for a ferromagnet is shown in the figure. The ferromagnet is placed inside a long solenoid with $1000$ turns/cm. The current that should be passed in the solenoid to demagnetise the ferromagnet completely is:

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Answer: (a)

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Q16JEE Main 2016MediumOld syllabus

Hysteresis, Soft Iron vs Steel & Shielding · Soft iron vs steel: choice of material

Hysteresis loops for two magnetic materials $A$ and $B$ are given below:

These materials are used to make magnets for electric generators, transformer core and electromagnet core. Then it is proper to use:

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Answer: (b)

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Q17JEE Main 2014Easy

Hysteresis, Soft Iron vs Steel & Shielding · Demagnetising current

The coercivity of a small magnet where the ferromagnet gets demagnetized is $3 \times 10^{3}\text{ Am}^{-1}.$ The current required to be passed in a solenoid of length $10\text{ cm}$ and number of turns $100,$ so that the magnet gets demagnetized when inside the solenoid, is: