A Van de Graaff generator makes your hair stand on end because…
2. each strand of hair picks up the same charge and repels each other
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eraser
Reset score!
Oops!
shark
Other team loses 20 points!
Okay!
rocket
Go to first place!
Okay!
thief
Give points!
5
10
15
20
25
5
The one with minus sign is called
electron
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10
A class 2 lever has the _________ in the middle
load
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20
Calculate the moment of the force about the pivot.
4 Nm
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20
Calculate the weight labeled A in the diagram.
m1=m2 | F1 x A1=F2 x A2 | 4 N x 3 m = A x 2 m | A = 6 N
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baam
Lose 15 points!
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magnet
Take 5 points!
Okay!
shark
Other team loses 15 points!
Okay!
thief
Give points!
5
10
15
20
25
eraser
Reset score!
Oops!
seesaw
Swap points!
Okay!
fairy
Take points!
5
10
15
20
25
banana
Go to last place!
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10
What can the boys do to balance the seesaw?
Boy W moves closer to F
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5
Some materials which allow an electric current to flow through them are called
conductor
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10
If the clockwise and anticlockwise moments on a seesaw are equal, what will happen?
The seesaw is balanced and will not move.
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10
ball A is given negative charge. a polythene rod is charged by rubbing it with woolen clothes. It will attract balloon A. What charge does the balloon A in third experiment?
positive charge
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5
By using the principle of moment, determine the direction of the see-saw as shown.
Turning in the clockwise direction
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baam
Lose 10 points!
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gift
Win 5 points!
Okay!
gift
Win 25 points!
Okay!
baam
Lose 25 points!
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5
SI unit of charge is?
Coulomb (C)
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10
complete the last column to show whether you would expect the balloons to attract or repel one another. p? q?