The magnetic field lines are__________.
A)curves
B)closed loops
c)lines
Closed loops
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15
Magnetic poles that are unlike ________and magnetic poles that are alike ___________.
A) run; stay
B)attract; repel
C)stay; repel
D)repel; attract
attract; repel
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trap
No points!
Oops!
rocket
Go to first place!
Okay!
rocket
Go to first place!
Okay!
banana
Go to last place!
Oops!
15
Refer the diagram. A wire carries a current, creating a magnetic field around itself as shown. The current in the wire is:
Directed to the right
Directed to the left
Directed to the left
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monster
Reset all scores!
Oops!
shark
Other team loses 25 points!
Okay!
gift
Win 20 points!
Okay!
thief
Give points!
5
10
15
20
25
eraser
Reset score!
Oops!
fairy
Take points!
5
10
15
20
25
rocket
Go to first place!
Okay!
lifesaver
Give 5 points!
Oops!
15
No two field-lines are found to cross each other.
False
True
True
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15
What areas of a magnet have the strongest magnetic effect?
A)the middle
B) the poles
C) the sides
the poles
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15
A freely suspended bar magnet always rest in N-S direction
True
False
true
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15
Which of the following correctly describes the magnetic field near a long straight wire?
A)The field consists of radial lines originating from the wire.
B)The field consists of concentric circles centred on the wire.
The field consists of concentric circles centred on the wire.
