Electric Current And Power

Question 0

Define current.

Answer 0

Current is the rate of flow of charge. It is how many coulombs pass a point every second. It is measured in amps (A/I)

Question 1

What is voltage?

Answer 1

Voltage is the amount of energy that is given to each coulomb. The electrical pressure that makes the current flow, it is measured in volts (v= Potential difference).

Question 2

If the voltage is increased what would happen to the current?

Answer 2

In order to maintain the same amount of power , if the voltage was increased the current must be decreased.

Question 3

Describe how AC current moves.

Answer 3

An Alternating current constantly changes direction.

Question 4

Describe how DC moves.

Answer 4

A direct current moves only in one direction.

Question 5

What is power a measure of?

Answer 5

Power is a measure of how much energy is transferred every second. It is measured in watts (w) of Joules per second (J/S)

Question 6

What is the equation needed to figure out the amount of power if you have the information of voltage and current?

Answer 6

Power= voltage x current
P
VxI

Question 7

What is the equation needed to calculate energy i you have the units of time and power?

Answer 7

Energy= Power x Time
E
PxT

Question 8

What is another name for voltage?

Answer 8

Potential difference.