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
Which form of electric discharge appears in nature?
rain
ocean currents
lightning
volcanoes
Electric current originates from which part of an atom?
nucleus
negatively charged electrons
positively charged electrons
entire atom acting as a unit
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
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.
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
Both A and B
Neither A nor B
Which of the following is a description of electrical current?
The electric potential between two points in a circuit.
The flow of protons through a material.
The movement of resistance
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.
When performing an experiment with electricity, which material would act as an insulator?
staple
popsicle stick
wire
paper clip
When a plastic rod is charged positively by friction,
It gains protons
It loses protons
It loses electrons
It gains neutrons
