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
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.
Which form of electric discharge appears in nature?
rain
ocean currents
lightning
volcanoes
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
A capacitor is an electrical device that
Measures electrical energy
Stores electric charge
Measure electrical conductivity
Stores electric potential
What aspect of a capacitor is constant regardless of external changes?
Capacitance
Charge
Voltage
Electric Potential Energy
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.
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
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.
Electric voltage is a measure of
total amount of current
how much current is moving through a circuit
the ratio of work done moving electric charges
none of these
