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100

Electricity is the flow of what?

Electrons

100
What do conductors have in common?

Metal

100

What is electrical pressure called?

For a Lollipop: Tell me how we added electrical pressure to the circuits we built in class.

Voltage, measured in Volts.

Battery

100

What is a circuit?

A closed path for electric current.

100

What is a resistor?

A component used to resist current.

200

Name the three types of electricity.

Static

Alternating

Direct

200

Can a pencil be a conductor?

Yes, the graphite conducts electricity.

200

What is measured in Ohms?

Resistance

200
Name 2 loads on an electric Circuit.

lamp

resistor

motor

200

What is the value of a resistor with the following color pattern:

Yellow, Red, Red, Gold

For a Lollipop: Convert it to kilo ohms.

4,200 Ω ±5%

4.2 kΩ ±5%

300

Which type of electricity do our Chromebooks use?

For a lollipop: What kind of electricity are we using when we charge our Chromebooks?  

Direct Current

We use alternating current to charge our Chromebooks, but the powercord has a rectifier on it which turns AC to DC.

300

Name two insulators.

For a lollipop: Name 4.

Wood

Rubber

glass

air

300

What does I represent?

For a lollipop:  What is it measured in?

I = Current

Measured in Amps (A)

300

Name the type of circuit that has multiple paths for electrons to flow.

For a lollipop: Provide an example of such a circuit.

Parallel

Examples: houses, anywhere that you want the electricity  to reach components even if one fails.

300

What can we move past a copper wire to create a current?

A magnet

400

True or False:

Electrons flow from the negative side of the battery, through the circuit, back to the positive side of the circuit.

True

When we are talking about electrons, they flow from negative to positive. 

When we are talking about current flow, it goes from positive to negative.

400

What is an example of a energy source in a circuit?

A battery.

400

Is this True or False?

V = IxR

True

V = IxR

400

Draw a resistor schematic.

For a lollipop: Draw a circuit schematic with a battery, a switch, an LED and a resistor.

Will be on board.

400

How can I tell if a batter is bad?

Measure the voltage with a muiltimeter.

500

What is a short circuit?

For a lollipop:  What can happen when we have a  short circuit?

A circuit that does not offer any resistance to the electrons flowing through  the circuit.

500

An electric heater with a resistance of 30 Ω is connected to a 120 V source. According to Ohm’s Law how much current will flow in the circuit?

For a lollipop: Use the GUESS method.

G: R = 30 Ω, V = 120V

U: I

E: I = V/R

S: I = 120V/30Ω

S: I = 4A

500

When resistors are connected in series how do we calculate their resistance?

For a lollipop:  Can we do the same with batteries?

Add them up.

Yes!

500

Explain to me how to measure resistance.

For a Lollipop:  Explain how to measure current & voltage.

Resistance - Do not connect battery.  Take component out of system and measure.

Voltage - Measure across component while circuit is working.  Battery must be connected.

Current -  Multimeter must be part of the circuit to measure current.

500

Explain the difference between AC and DC electricity.

For a lollipop: Provide an example of AC electricity.

AC = Alternating Current - electrons regularly switch directions within the circuit

DC = Direct Current - electrons always move in the same direction within  the circuit

Example: wall sockets