[Quiz] Science Physics - Magnetism - Free Online Tests - 9

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TNPSC Free Online Test by TNPSC GURU.in
Subject	Science
Exam Portions	Physics - Magnetism
Science Physics- Free Online Tests - 9
No of Questions	20
Duration	10 Min
Difficulty Level	Easy
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TNPSC Free Online Test

1. Chinese know the property of magnet since
   
   1.  1100 AD
   2.  1000 BC
   3.  1100 BC
   4.  2000 BC
   
   
2. Magnetic compass was used by chinese since
   
   1.  1100 AD
   2.  1000 BC
   3.  2000 BC
   4.  1100 BC
   
   
3. Who told that earth behaves as a giant bar magnet
   
   1.  Gilbert
   2.  Albert einstein 
   3.  Newton
   4.  Johannes Kepler
   
   
4. Earth's magnetic field extends to a height of
   
   1.  2 times the radius of earth
   2.  3 times the radius of earth
   3.  4 times the radius of earth
   4.  5 times the radius of earth
   
   
5. Choose the correct answer
   
   1.  Earth's magnetism is also due to the electric currents of the earth
   2.  Earth's magnetism is also due to the radiation of the sun
   3.  Earth's magnetism is also due to the action of the moon
   4.  All the above are correct
   
   
6. Magnetic length is ______ the geometric length
   
   1.  always more than
   2.  less than
   3.  more than
   4.  equal to
   
   
7. Magnetic poles exists in
   
   1.  Single
   2.  Neither Single nor Pairs
   3.  Single or Pairs
   4.  Pair
   
   
8. Unit of Pole Strength
   
   1.  ampere metre
   2.  ampere metre square
   3. Weber
   4.  Tesla
   
   
9. Unit  of magnetic dipole
   
   1. Weber
   2.  ampere metre
   3.  ampere metre square
   4. Tesla
   
   
10. Curie Temperature is a transition temperature at which
    
    1.  ferromagnetic become diamagnetic
    2.  ferromagnetic become paramagnetic
    3.  diamagnetic become ferro magnetic
    4.  paramagnetic become ferromagnetic
    
    
11. Curie temperature for iron is ___ K
    
    1.  500
    2.  273
    3.  2000
    4.  1000
    
    
12. Magnetic tapes uses
    
    1.  all the below
    2.  paramagnetic
    3.  diamagnetic
    4.  ferromagnetic
    
    
13. Which of the below is not a ferromagnetic substance
    
    1.  Al
    2.  Fe
    3.  Co
    4.  Ni
    
    
14. Which of the following is not a paramagnetic substance
    
    1.  Mn
    2.  Cr
    3.  Pt
    4.  Bi
    
    
15. Which of the following is not a diamagnetic substance
    
    1.  Sb
    2.  Au
    3.  Hg
    4.  Cuso4
    
    
16. In dia magnetic the net magnetic moment of  atoms is
    
    1.  One
    2.  Zero
    3.  Low Positive Value
    4.  Very Large
    
    
17. Unit for Magnetic Suscptiblity
    
    1.  Tesla
    2.  Ampere
    3. Weber
    4.  No Unit
    
    
18. Island of Magnesia is in
    
    1.  Greece
    2. China
    3.  India
    4. West Indies
    
    
19. Non Uniform Magnetic field can be
    
    1.  Only Divergent
    2.  Only convergent
    3.  Convergent or divergent
    4.  parallel
    
    
20. Direction of magnetic lines of force inside a magnet
    
    1.  North Pole to South Pole
    2.  South Pole to North Pole
    3.  Both a and b
    4. All are wrong
    
    

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