Chapter 6, Section 2

Question 1

Vocabulary

What is electric current?

Answer 1

The net movement of electric charges in a single direction

Measured in Amperes

Question 2

Vocabulary

What is a voltage difference?

Answer 2

It is related to the force that causes electric charges to flow

Measured in volts

Question 3

Vocabulary

What is an electric circuit?

Answer 3

A closed path that electric current follows

Question 4

Vocabulary

What is resistance?

Answer 4

A tendency of a material to resist the flow of electrons and to convert electrical energy into other forms of energy, such as thermal energy

Measured in Ohms

Question 5

Vocabulary

What is Ohm’s Law?

Answer 5

It states that the current in an electric circuit equals the voltage difference divided by the resistance

Question 6

Question

Is there positive flow in a current?

Answer 6

No. Because current flows in the direction of positive charge, it is actually negatively charged electrons moving through the circuit.

Electrons in a circuit also move from lower voltage to higher voltage.

Question 7

Question

What is the difference between wet and dry-cell batteries?

Answer 7

Wet-Cell: conducting liquid solution, used in automobiles

Dry-Cell: conducting paste, used in household objects

Question 8

Questiong

What is the voltage difference of outlets?

Answer 8

Most household objects plug into 120 V outlets, but appliances and other large-scale tools use 240 V outlets.

Question 9

Question

What is the Ohm’s Law (current) equation?

Answer 9

I = V/R
Current (A) = Voltage Difference (V) / Resistance (Ohms)

Question 10

Question

What are AC and DC and what are their differences?

Answer 10

AC flows out of outlets and direct currents are used in batteries.

An example of an AC/DC adapter is a charging block.