1. .Natural magnet is found in:
(A) Magnesia
(B) Egypt
(C) South Africa
2. .The mineral of natural magnet is called:
(A) Copper
(B) Aluminium
(C) Magnetite
3. .Natural magnet has:
(A) No pole
(B) Two poles
(C) One pole
4. .The kinds of magnetic substances are:
(A) Two
(B) One
(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) Ferramagnetic
(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) Range
(B) Point group
(C) Domain
9. .No. of atoms in a domain is:
(A) 10¹⁰
(B) 10¹²
(C) 10¹⁵
(D) 10²⁰
10. .The temperature at which ferromagnetic substances turn into paramagnetic substances is called:
(A) Kelvin
(B) Curie temperature
(C) Centigrade
(D) Fahrenheit