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Topic 4.3
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1
If you touch an uncharged object with a charged object…
A)the positive charges will move from the charged object to the uncharged object.
B)the neutral charges will move from the charged object to the uncharged object.
C)Negative charges will move to or from the uncharged object.
D)the uncharged object will remain uncharged.
2
What is an electroscope?
A)a device used to test whether an object is charged
B)a device used to confirm that electrons can flow through an object
C)an instrument used to remove excess charges from thunderclouds
D)a way to detect if a lightning storm is about to occur
3
If you touch the ball of an electroscope with a charged object …
A)the leaves will move upwards, then move back down.
B)one leaf will move upwards.
C)The leaves will remain stationary.
D)the leaves will move apart.
4
Charging by induction occurs when …
A)a charged object is brought near a neutral object without touching it.
B)a neutral object is brought near another neutral object without touching it.
C)a charged object touches a charged object.
D)a charged object touches a neutral object.
5
If all of the excess charges are removed from an object, the object is…
A)positively charged.
B)negatively charged.
C)neutral.
D)induced.
6
Turbulence in thunderclouds causes…
A)charges to merge together.
B)the tops of the clouds to be negatively charged.
C)the bottoms of the clouds to be positively charged.
D)the bottoms of the clouds to be negatively charged.
7
Why are dangling chains attached to some trucks?
A)to allow electrical charges to accumulate
B)to carry electrical charges away from the truck
C)to measure the distance of the truck from the road
D)to release water that is accumulating under the truck





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