1. . Natural magnet is found in:
(A) Magnesia
(B) Egypt
(C) South Africa
(D) Russia
2. . The mineral of natural magnet is called:
(A) Copper
(B) Aluminium
(C) Magnetite
(D) Iron
3. . A natural magnet has:
(A) No pole
(B) One pole
(C) Two poles
(D) Three poles
4. . The kinds of magnetic substances are:
(A) One
(B) Two
(C) Four
(D) Three
5. . The substances which are weakly attracted by magnets are called:
(A) Paramagnetic
(B) Diamagnetic
(C) Ferromagnetic
(D) None of these
6. . The substances which are repelled by magnets are called:
(A) Ferromagnetic
(B) Paramagnetic
(C) Diamagnetic
(D) All of these
7. . The substances which are strongly attracted by magnets and can also be magnetised are:
(A) Magnets
(B) Diamagnetic
(C) Paramagnetic
(D) Ferromagnetic
8. . The group of atoms pointing in the same direction is called:
(A) Domain
(B) Point group
(C) Range
(D) Gang
9. . Number of atoms in a domain is approximately:
(A) 10¹⁰
(B) 10¹²
(C) 10¹⁵
(D) 10²⁰
10. . The temperature at which ferromagnetic substances become paramagnetic is called:
(A) Curie temperature
(B) Kelvin
(C) Centigrade
(D) Fahrenheit