KCET 2018 | Magnetism and Matter Question 12 | Physics

Needles $N_1, N_2$ and $N_3$ are made of a ferromagnetic, a paramagnetic and adiamagnetic substance, respectively. A magnet when brought close to them will

attract all three of them

attract $N_1$ strongly, $N_2$ weakly and repel $N_3$ weakly

attract $N_1$ strongly but repel $N_2$ and $N_3$ weakly

attract $N_1$ and $N_2$ strongly but repel $N_3$

KCET 2018

MCQ (Single Correct Answer)

-0

The strength of the Earth's magnetic field is

constant everywhere

zero everywhere

having very high value

varying from place to place on the Earth's surface

KCET 2018

MCQ (Single Correct Answer)

-0

A jet plane having a wing-span of 25 m is travelling horizontally towards East with a speed of $3600 \mathrm{~km} / \mathrm{hr}$. If the Earth's magnetic field at the location is $4 \times 10^{-4} \mathrm{~T}$ and the angle of dip is $30^{\circ}$, then the potential difference between the ends of the wing is

4 V

5 V

2 V

2.5 V

KCET 2017

MCQ (Single Correct Answer)

-0

The susceptibility of a ferromagnetic substance is

Zero

$>1$

$<1$

$\gg 1$

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