ELECTRICITY Flashcards
(13 cards)
Why can rubbing two objects
together give both objects
electrostatic charges?
Friction rubs electrons from one
object onto the other.
The object that loses electrons gains
a positive charge, the object that
gains electrons gains a negative
charge
Are electrostatic forces contact or
non-contact forces?
NON CONTACT
What are the units of power?
What are the units of power?
Why will larger batteries last
longer than smaller batteries?
They contain more chemicals that
can react
What transfers energy in an
electrical circuit?
(from a battery to components)
(Flow of electrical) charges
What does electrical resistance
measure?
How difficult it is for electrical charge
to flow
Is resistance larger in a thick or
thin wire?
thin
Is resistance larger in a longer or
shorter wire?
longer
How do we measure the potential
difference across a component?
Connect a voltmeter across the
component in parallel
What are the units of charge?
coulumbs
What do all conductors contain?
Particles that can carry (electric)
charge through the material
Is current used up by the
electrical components in a circuit?
No – current is not used up by
components
What is an electrical circuit?
A closed conducting loop containing
a battery (source of potential
difference)
