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
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.
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
Why does static electricity move from you to a metal object after you have walked over new carpet?
It is attracted to the metal
It is attracted to you
It is attracted to the carpet
It is made in your shoes.
Two different materials are rubbed against each other and acquire opposite charges when separated. This is an example of charging by
conduction
friction
induction
Mastercard™, Visa™ or American Express™.
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
Which form of electric discharge appears in nature?
rain
ocean currents
lightning
volcanoes
A capacitor is an electrical device that
Measures electrical energy
Stores electric charge
Measure electrical conductivity
Stores electric potential
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.
What is the meaning of the term "resistance" as applied to electricity? Resistance is a measure of a material's opposition.
Voltage
Movement of protons
Current
Electric force
