Definitions
The difference in electric potential between two points
Potential Difference
An electric circuit in which devices are connected along a single loop of wire such that the same current is in each device.
Series Circuit
Name two kinds of practical "electrical pumps"
battery and a generator
the flow of electric charge that transports energy from one place to another
Electric Current
An electric circuit in which electrical devices are connected in such a way that the same voltage acts across each one, and any since one completes that circuit
Parallel Circuit
Does heating a metal wire increase or decrease its electrical resistance?
increase
the property of material that resists electric current
Electrical Resistance
From where do electrons originate that produce and electric shock when you touch a charged conductor?
When you are shocked, your own body is the source of the electrons, but not the source of the energy imparted to them.
Why are electrons the principal charge carriers in metal wire?
electrons are free to wander
Direct Current
What is meant by drift velocity?
the net velocity of the electrons that make up the electric current
If voltage is held constant while resistance doubles, what change occurs in the current?
when the resistance doubles, the current is halved
the rate of energy transfer or the rate of doing work
Electric Power
What is the error in saying that the source of electrons in a circuit is the battery or generator?
the source is conducting wires themselves, no the power source
How does wetness affect the resistance of your body?
wetness lowers body's electrical resistance