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WorksheetsPractice for Electrostatic Test Retake
Total questions: 13
Worksheet time: 16mins
What is the best description of a van der Graaff generator?
a machine that creates electricity only
a machine that accumulates a certain charges either positive or negative
a machine for demonstrations
a machine that accumulates only positive charges
Static build-up occurs the most often when . . .
both materials are insulators (like 2 balloons)
both materials are conductors (like 2 aluminum plates)
one material is a conductor and one is an insulator; (like dryer and socks)
When you touch a doorknob and get a shock, this is because . . .
electrons flow into your hand.
electrons flow out of your hand.
electrons can flow anywhere.
Why did people's hair stand on end when a person was touched the sphere of Van de Graaff
The positively charged (+) hair was repulsed by the positive charged (+) person and each other.
The positively charged (+) hair was repulsed by the negatively charged (-) person and each other.
The negatively charged (-) hair was attracted by the negatively charged (-) person and each other.
The negatively charged (-) hair was attracted by the positively charged (+) person and each other.
If something loses electrons it becomes...
Positively charged (+)
Negatively charged (-)
Neutral
Uncharged
If something gains electrons it becomes...
Positively charged (+)
Negatively charged (-)
Neutral
Uncharged
When a negatively charged balloon is brought close to a wall, the positive charges in the wall are
attracted to the balloon
repelled from the balloon
do not affect the balloon
neutralized
Gravitational force depends on mass. What does the electrical force depend on?
Volume
Density
Charge
Charge density
Why don't we feel electrical forces since electrical forces are MUCH greater than gravity?
Gravity is on a macroscopic scale only
Electric force acts on a microscopic scale only
Opposite charges cancel, but mass cannot
Which of the following labeled points is in the region with the strongest force of electric charge
A
B
C
D
Electric charge is neither created nor destroyed, but can be rearranged or transferred from one object to another.
true
false
