soal-soal kemagnetan

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Comprehention test 5

Give a cross mark (x) on A,B,C, or D for the correct answer.

1. Magnet which exist in most electric device such as a telephone and electric bell is….magnets.

a.       Natural

b.      Artificial

c.       Original

d.      False

2. Iron is easily made magnets becouse…

a.       Its elementary magnets are not changebale in direction

b.      Its elementary magnets are changebale in direction.

c.       C. its elementary magnets are lost

d.      All are false

3. In the following that are include in diamagnetic bodies as…

a.       Aluminum and platinum

b.      Soft iron and steel

c.       Gold, bismut, and zinc

d.      All are true

4. The following that are include in feromagnetic bodies are…

a.       Steel, iron, nickel

b.      Aluminum and platinum

c.       Gold, Zinc, and bismuth

d.      Wood and rubber

5. A metal that is easily made magnets, but also easily loses its magnetic property is called…magnets.

a.       Permanent

b.      Fixed

c.       Bar

d.      Temporary (non-permanent)

6. A compass is a navigation device that always points to….direction.

a.       The south

b.      The north

c.       The east

d.      The west

7. x, y shown…

a.       Induction X=N, Y=S

b.      Induction X=S, Y=N

c.       Electromagnetism Y=S, X=N

d.      Electromagnetism Y=N, X=S

8. The device below that does not use a magnets is…

a.       Electric bell

b.      Telephone

c.       Relay

d.      Electric iron

9. Oersted find an importhant phenomenon, that is around a wire carrying electric current there is a/an…field

a.       Electric

b.      Current

c.       Magnetic

d.      Voltage

10. The use of electromagnet in life is found in…

a.       A switch

b.      Electric bell

c.       Electric iron

d.      A fuse

11. The magnitude and direction of lorentz force is influced by…

a.       The length of wire

b.      The magnitude of lectric current

c.       Direction of mahnetic field

d.      All are correct

12. The formulation of lorentz force is…

a.      

b.     

c.      

d.     

13. In an aluminum foil, it flows current of 2A and it is influeced by a magnetic field of 4 T. if the length of aluminum foil is 1.5 m, the lorents force is…( )

a.       12 N

b.      11 N

c.       10 N

d.      9 N

14. A device that does not work according to Lorentz force is…

a.       Ammeter

b.      Voltmeter

c.       Electric bell

d.      Electric motor

15. The part of electric bell that is used to disconnect and connect electric current is…

a.       Gong

b.      Battery

c.       Interruptor

d.      Steel spring