Current

What is current

The rate of flow of charge

What is an amp

The number of coulombs of charge passing through a point in 1 second

What is the direction of conventional current

Positive to negative

What is a charge carrier

Electrically charged particlas that are free to move in an object

What is an electrolyte

A substance containing ions that conduct electricity

In most objects what are the charge carriers

Electrons

What is the value for elementary charge

1.6 × 10^-19

What is mean drift velocity

The average velocity of the charge carriers moving through a material

What is the mean drift velocity equation

I = Anev

Current is proportional to the average speed of the drifting

What is number density

The number per unit volume of charge carriers

What are the 2 was current through a wire can be increased

Increasing the number of electrons

Increasing the mean drift velocity of the electrons

How does increasing the number of electrons increase the current in a wire

More charge is carried past a point in a given time

How can you increase the number of electrons

Increasing the number density

Increasing the cross sectional area

How does increasing the mean drift velocity of the electrons increase the current in a wire

It takes less time for the given amount of charge to be transferrred

How can you increase the mean drift velocity of the electrons

Increasing the potential difference across the wire

Why are metals good conductors

They have a high number density

What is the number density in a perfect insulator

Zero

How many charge carriers does a semiconductor have

Less than a conductor but more than an insulator.