electricity and magnetism

Question 1

Let’s say we have a 25V (volts) circuit running at 2A (amps). What is the total resistance of that circuit?

Answer 1

12.5 ohms

Because R = V/I

Question 2

Magnetism is caused by the flow of __________ from one pole to the other (by convention, we say they travel from positive to negative, but scientists aren’t really sure in which direction it travels).

Answer 2

electrically charged particles

Question 3

Current is induced by:

Answer 3

A conductor, a magnetic field, and relative motion

Question 4

An example of an insulator is:

Answer 4

rubber

Question 5

Electricity is the flow of ______ between two points due to a difference in potential (voltage).

Answer 5

Electrons

Question 6

Voltage is the measure of __________ between any two points in a circuit.

Answer 6

Electric potential

Question 7

A ______ is a part of an electrical circuit that we can use to open (turn off) or close (turn on) a circuit.

Answer 7

Switch

Question 8

Conductors are materials that:

Answer 8

allow electricity to pass

Question 9

The three main components of an atom are:

Answer 9

protons, neutrons, and electrons

Question 10

Generally speaking, any material that easily transfers heat:

Answer 10

is a good electrical conductor

Question 11

Power is expressed in:

Answer 11

watts