Multiple choice question XVI — task. Science CBSE, Class 10.

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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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1. Which of the following is NOT supposed to be the cause of earth’s magnetic field?

Molten charged fluid circulating in the core of the earth
Huge magnet lying in the central part of the earth
Rotation of the earth about its own axis and the existence of ions in the upper parts of earth’s atmosphere
Presence of iron and nickel in the core of the earth

2. Which of the following is the main source of magnetism in a bar magnet?

spinning of electrons
spinning of atoms
polarization of atoms
orbital motion of electrons

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