JEE Main 2022 · 25 Jun · Shift 2 · Physics Q40

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PhysicsSingle correct+4 / -1Question 40 of 90

Given below are two statements :

Statement I : Susceptibilities of paramagnetic and ferromagnetic substances increase with decrease in temperature.

Statement II : Diamagnetism is a result of orbital motions of electrons developing magnetic moments opposite to the applied magnetic field.

Choose the correct answer from the options given below :-

Both Statement I and Statement II are true.

Both Statement I and Statement II are false.

Statement I is true but Statement II is false.

Statement I is false but Statement II is true.

Answer and worked solution

Official answer: A

Statement I is true: paramagnetic susceptibility follows Curie's law $\chi\propto\frac1T$ , and ferromagnetic susceptibility above the Curie point also rises as $T$ falls.

Statement II is true: an applied field changes the orbital motion so that induced moments oppose it.

(A)

Topics:Magnetic materials

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JEE Main 2022 · 25 Jun · Shift 2, Physics question 40