A capacitor is an electrical device that
Measures electrical energy
Stores electric charge
Measure electrical conductivity
Stores electric potential
When a plastic rod is charged positively by friction,
It gains protons
It loses protons
It loses electrons
It gains neutrons
How can you tell when static electricity has been discharged?
Heat is released that can be felt.
Light is released and you can feel a shock.
Static electricity gives off many different colors.
The object begins to spin rapidly when it is shocked.
Lightning conductors are used to protect tall buildings from the damages due to lightning. Which one of the following statements about a lightning conductor is not true?
its top must be higher than the highest part of the building.
it has sharp points at its top end.
its lower end is buried in the ground.
it must be insulated from the building.
What will happen if you add more batteries to an electrical circuit containing light bulbs?
There is no change
The bulbs will dim
The bulbs will be brighter
The bulbs will last longer.
When performing an experiment with electricity, which material would act as an insulator?
staple
popsicle stick
wire
paper clip
Electric current originates from which part of an atom?
nucleus
negatively charged electrons
positively charged electrons
entire atom acting as a unit
As the voltage across the capacitor changes what happens to the capacitor?
There is a direct relationship between the voltage and the charge stored on the capacitor.
The electric potential energy stored in the capacitor changes by the square of the change in voltage.
Both A and B
Neither A nor B
Two different materials are rubbed against each other and acquire opposite charges when separated. This is an example of charging by
conduction
friction
induction
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How can electric charge be established?
Electrons can be removed from atoms and accumulated to produce a negative charge
Atoms from which electrons have been removed produce positive electric charge
