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.
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
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
Electric current originates from which part of an atom?
nucleus
negatively charged electrons
positively charged electrons
entire atom acting as a unit
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.
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.
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™.
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.
Which form of electric discharge appears in nature?
rain
ocean currents
lightning
volcanoes