Download App

Magnetism And Matter — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsMagnetism And Matter1 Mark
Question
What are permanent magnets? Give one example.
✓

Answer

Substances, which at room temperature, retain their ferromagnetic property for a long period of time are called permanent magnets. Alnico, cobalt, steel and ticonal.

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

Explore more

More "1 Marks Question" from Magnetism And Matter→Magnetism And Matter — all question types→Physics STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

When the size of a soap bubble is increased by pushing more air in it, the surface area increases. Does it mean that the average separation between the surface molecules is increased?
→
Name the part of the electromagnetic spectrum of wavelength $10^{–2 }m$ and mention its one application.
→
A steady current is flowing in a cylindrical conductor. Does electric field exist within the conductor?
→
The lower end of a capillary tube of radius $1\ mm$ is dipped vertically into mercury:
  1. Find the depression of mercury column in the capillary.
  2. If the length dipped inside is half the answer of part $(a),$ find the angle made by the mercury surface at the end of the capillary with the vertical. Surface tension of mercury $= 0.465N/m$ and the contact angle of mercury with glass $= 135^\circ .$
→
A scooter weighing 150kg together with its rider moving at 36km/ hr is to take a turn of radius 30m. What horizontal force on the scooter is needed to make the turn possible?
→
The magnifying power of a simple microscope will be maximum for which colour of light and minimum for which colour of light?
→
Carbon, silicon and germanium have four valence electrons each. These are characterised by valence and conduction bands separated by energy band gap respectively equal to $(E_g)_C, (E_g)_{si }$and $(E_g)_{Ge}.$ Which of the following statements is true?
→
An electron is moving a along +ve x-axis in the presence of uniform magnetic field along +ve y-axis. What is the direction of the force acting on it?
→
For which colour the magnifying power of a simple microscope is highest? For which colour it is lowest?
→
Will a charged body attract a nearby uncharged body?
→