What aspect of a capacitor is constant regardless of external changes?
Capacitance
Charge
Voltage
Electric Potential Energy
When a plastic rod is charged positively by friction,
It gains protons
It loses protons
It loses electrons
It gains neutrons
Which statement explains why will make the balloon stick to a wall?
Rubbing the balloon on your hair creates a temporary magnet.
The balloon gets static charge when rubbed on someone’s hair.
There is glue on the wall
It is a magic trick.
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.
Why would a comb that had been run through hair touch one cheerio and cause the two Cheerios to come together. The comb had...
a negative charge
a positive charge
a different charge than the Cheerios already had
the same charge as the Cheerios already had
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.
A capacitor is an electrical device that
Measures electrical energy
Stores electric charge
Measure electrical conductivity
Stores electric potential
Electric current originates from which part of an atom?
nucleus
negatively charged electrons
positively charged electrons
entire atom acting as a unit
A person combs her hair static electricity is sometimes generated by what process?
Contact when between the comb and hair results in a charge
Friction between the comb and hair transfers electrons
Deduction between the comb and hair
Induction between the comb and hair
What is the meaning of the term "resistance" as applied to electricity? Resistance is a measure of a material's opposition.
Movement of protons
Current
Electric force
