Space
C. The magnetic poles are separated.
B.X
CY
1. A bar magnet is divided in two pieces. Which of the following statements is true?
A. The bar magnet is demagnetized.
B. Two new bar magnets are created.
2. A bar magnet is divided in two pieces. Which of the following statements is true about the force between the broken pieces if they
D. The magnetic field of each separated piece becomes stronger.
face each other with a small separation?
A. There is an electric repulsive force between the broken pieces.
B. There is an electric attractive force between the broken pieces.
C. There is a magnetic repulsive force between the broken pieces.
D. There is a magnetic attractive force between the broken pieces.
3. Which of the following is the space around a magnet in which there is a magnetic effect?
A. lodestone B. a magnetic field
C. an electromagnet
D. a magnetic pole
4. Which of the following materials does not have magnetic properties?
A. Nickel B. Iron
C. Cobalt D. Tin
5. In ancient times, what was the name given to the rock that had magnetic properties?
A. Gemstone B. Lodestone
C. Pyrite D. Brimston
6. Like poles of a magnet
each other, and unlike poles each other. Which of the following pairs of words correctly fit into
this sentence?
A. repel, attract B. attract, repel
C. attract, attract
D. repel, repel
7. Magnetic poles will always occur
A. singly
B. in groups of four
C. in threes
D. in pairs
8. Magnet X can hold a maximum of 5 paper clips, magnet y can hold a maximum of 3 similar paper clips, and magnet Z can hold a
maximum of 7 similar paper clips. Which one of the magnets is ine strongest?
AZ
D. They are all equally strong
9. What term is used when two magnets come together?
A. Attraction
B. Friction C. Repulsion D. Opposition
10. Which of the following statements is true about magnetic fields?
A. They carry electrons from one end of the magnet to the other.
B. Magnetic fields exert an attractive force on plastic materials
C. They travel from north to south
D. Magnetic field travel from east to west around the earth
11. Which of the following devices will you NOT find a magnet?
A. Electric motor B. Bicycle dynamo C. Electric bell
D. LED flashlight
12. Which of the following is responsible for the earth’s magnetic field?
A. Convective currents in earth’s core
C. Rotational motion of earth
B. Diversive current in earth’s core
D. Transrotational motion of earth
13. How does the magnetic compass needle behave in a magnetic field?
A. It assures a position right angle to magnetic field
C. It starts rotating
B. I assures a position which follows a line of magnetic flux
D. None of these
14. Which of the following is the point in a magnet where the intensity of magnetic lines of force is maximum?
A. magnetic pole B. South pole
C. North pole
D. unit pole
15. Which of the following is the phenomenon by which a magnetic substance becomes a magnet when it is placed near a magnet?
A. Magnetic field
B. Magnetic phenomenon
D. Electromagnetic induction
16. What do you call a substance that attracts pieces of iron?
A. conductor
B magnet
C. semiconductor D. All of these
17. Who demonstrated the theory of electromagnetic induction in 1831?
A. Michael Faraday
D. Charles Coulomb
C. James Clerk Maxwell
18. Who discovered that a current-carrying conductor would move when placed in a magnetic field?
A. Michael Faraday
D. Gustav Robert Kirchhoff
19. Which law states that the polarity of the induced voltage will oppose the change in magnetic flux causing the induction?
A. Joules Law
B. Faraday’s Law
D. Lenz’ Law
C. Coulomb’s Law
C. Magnetic induction
B. Andre Ampere
B. Andre Ampere
C. Hans Christian Oersted
20 wli que el the conductor with right hand so that the stretched thumb points in the direction of the current, then encircling fingers
will
give the direction of magnetic lines of force round the conductor. What rule is this?
A. Left hand cork screw rule
21. How many poles does a magnet have?
D. Right hand rule
B. Right hand cork screw rule C. Left hand rule
B.3 C.4 0.5
A.2
GUYS PATULONG PO AKO PLS LANG PO
A. There is an electric repulsive force between the broken pieces.
Explanation:
sana makatulong
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