Question
The metallic pointer of a plotting compass gets deflected only when it is placed near a bar magnet because the pointer has:
  1. Electromagnetism.
  2. Permanent magnetism.
  3. Induced magnetism.
  4. Ferromagnetism.

Answer

  1. Permanent magnetism.

Explanation:

The needle of a compass is made of permanent magnetic materials.

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

A myopic person cannot see distinctly, objects that are:
The resistivity of copper metal depends on only one of the following factors. This factor is:
  1. Length.
  2. Thickness.
  3. Temperature.
  4. Area of cross-section.
A concave mirror has a focal length of 25cm. At which of the following distance should a person hold his face from this concave mirror so that it may act as a shaving mirror?
  1. 45cm
  2. 20cm
  3. 25cm
  4. 30cm
Give reason for your choice.
A circular loop placed in a plane perpendicular to the plane of paper carries a current when the key is ON. The current as seen from points A and B (in the plane of paper and on the axis of the coil) is anti-clockwise and clockwise respectively. The magnetic field lines point from B to A. The N-pole of the resultant magnet is on the face close to:
If the potential difference between the ends of a fixed resistor is halved, the electric power will become:
A solar cooker may not cook food if.
  1. The solar cooker is not placed in the shade.
  2. The glass sheet cover of solar cooker is not closed.
  3. A convex mirror reflector is not used.
  4. The food containers of insulting material are not used.
A student traces the path of a ray of light through a triangular glass prism for different values of angle of incidence. On analysing the ray diagrams, which one of the following conclusions is he likely to draw?
A beam of white light falls on a glass prism. The colour of light which undergoes the least bending on passing through the glass prism is:
  1. Violet.
  2. Red.
  3. Green.
  4. Blue.
To obtain a magnification of, -0.5 with a convex lens, the object should be placed:
  1. At F
  2. Between optical centre and F.
  3. Between F and 2F.
  4. Beyond 2F.
Which of the following coloured light has the least speed in glass prism?