JEE Main 2021 (Online) 22th July Evening Shift | Magnetic Properties of Matter Question 31 | Physics

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JEE Main 2021 (Online) 22th July Evening Shift

MCQ (Single Correct Answer)

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Out of Syllabus

Choose the correct option

True dip is always equal to apparent dip.

True dip is not mathematically related to apparent dip.

True dip is less than the apparent dip.

True dip is always greater than the apparent dip.

JEE Main 2021 (Online) 22th July Evening Shift

MCQ (Single Correct Answer)

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Statement I : The ferromagnetic property depends on temperature. At high temperature, ferromagnet becomes paramagnet.

Statement II : At high temperature, the domain wall area of a ferromagnetic substance increases.

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

Statement I is false but Statement II is true

Statement I is true but Statement II is false

Both Statement I and Statement II are false

Both Statement I and Statement II are true

JEE Main 2021 (Online) 20th July Evening Shift

MCQ (Single Correct Answer)

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Out of Syllabus

At an angle of 30$$^\circ$$ to the magnetic meridian, the apparent dip is 45$$^\circ$$. Find the true dip :

$${\tan ^{ - 1}}\sqrt 3 $$

$${\tan ^{ - 1}}{1 \over {\sqrt 3 }}$$

$${\tan ^{ - 1}}{2 \over {\sqrt 3 }}$$

$${\tan ^{ - 1}}{{\sqrt 3 } \over 2}$$

JEE Main 2021 (Online) 20th July Evening Shift

MCQ (Single Correct Answer)

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The magnetic susceptibility of a material of a rod is 499. Permeability in vacuum is 4$$\pi$$ $$\times$$ 10^$$-$$7 H/m. Absolute permeability of the material of the rod is :

4$$\pi$$ $$\times$$ 10^$$-$$4 H/m

2$$\pi$$ $$\times$$ 10^$$-$$4 H/m

3$$\pi$$ $$\times$$ 10^$$-$$4 H/m

$$\pi$$ $$\times$$ 10^$$-$$4 H/m

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