MCQ
A powerful magnet attracts:
  • A
    All materials.
  • Only ferromagnetic materials and their ores.
  • C
    Some materials and repels some other materials.
  • D
    Only iron and its ores but does not repel any material.

Answer

Correct option: B.
Only ferromagnetic materials and their ores.

There are only three types of materials diamagnetic, paramagnetic and ferromagnetic.
Diamagnetic materials will be repeled feebly.
Paramagnetic materials will be attracted feebly.
Only Ferromagnetic materials gets attracted very strongly.
As well as their ores also because they will also be ferromagnetic in nature.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

If yellow light in the Young's double slit experiment is replaced by red light, the fringe width will
Two resistances are connected in two gaps of a meter bridge. The balance point is $20\, cm$ from the zero end. A resistance of $15\, ohms$ is connected in series with the smaller of the two. The null point shifts to $40\, cm$. The value of the smaller resistance in $ohms$ is
de-Broglie hypothesis treated electrons as
The colour of the positive column in a gas discharge tube depends on
A man having height 6 m. He observes image of 2 m height erect, then mirror used is
In the given figure initially the capacitor is uncharged. Ratio of current at $t = 0$ & $t = \infty$ will be
A uniform heating wire of resistance $36\, \Omega$ is connected across a potential difference of $240\, {V}$ The wire is then cut into half and potential difference of $240\, {V}$ is applied across each half separately. The ratio of power dissipation in first case to the total power dissipation in the second case would be $1: {x}$, where ${x}$ is........... .
A small fish $0.4\, m$ below the surface of a lake, is viewed through a simple converging lens of focal length $3\, m$. The lens is kept at $0.2\, m$ above the water surface such that fish lies on the optical axis of the lens. The image of the fish seen by observer will be at $\left( {{\mu _{water}} = \frac{4}{3}} \right)$
When original mass of star is greater than $5\, M\, (M =$  mass of the sun). The death of this star will give rise to
The linear charge density on upper half of a segment of ring is $\lambda$ and at lower half, it is $-\lambda$. The direction of electrical field at centre $O$ of ring is :-