Tuesday 2/20 Check In

Open Ended

How was your weekend? Share what you did and what your goals are for this week--either personal, school-related or BOTH. Complete answers will receive PBIS points.

1) Stand Up and mix!
2) High five a partner when music STOPS.
3) Check in with your partner.

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​SUHUPU &
Timed Pair Share

​How to Check In:
1. Name
2. Share what you did this weekend, goals for this week, and whatever else is on your mind. Empty your cup.
3. Switch B's turn

Circuits and Ohm’s Law

• Battery

• Bulb

• Switch

• Resistor

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​Circuit Symbols

Match

Match the following parts of a circuit with its symbol.

Battery

Bulb

Switch

Resistor

• Battery

• Bulb

• Switch

• Resistor

• Shows the relationship between current, voltage, and resistance

• V is for VOLTAGE (volts)

• I is for CURRENT (amps)

• R is for RESISTANCE (ohms)

Ohm’s Law V=IR

• Comes from the battery or another voltage source

• The "push" that moves electrons around the circuit

• Think of it like a water pump - without the pump, the water would just sit in the pipe and not move anywhere

​Voltage (V)

• Electrons in the circuit flowing or moving around the circuit

• Measured in amps

• When electrons move faster, the current is greater

• Like the water flowing through a pipe

Current (I)

• Makes it harder for electrons to flow through the circuit

• Measured in Ohms

• Kind of like friction or sand that slows the water in the pipe down

​Resistance (R)

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Match

Match the meaning of each variable in Ohm's Law

• V

• I

• R

Voltage (V)

Current (Amps)

Resistance (Ω)

• Voltage (V)

• Current (Amps)

• Resistance (Ω)

Labelling

Click and drag the variables in Ohm's law to parts of the graph

Drag labels to their correct position on the image

Resistance

Current (I)

Voltage (V)

Open Ended

Look at the picture. How can you describe the relationship between Voltage (V), Resistance (R) and Current (I)?

Multiple Choice

As the RESISTANCE of a circuit increases, the CURRENT will

• increase
• decrease
• stay the same

Multiple Choice

If the Voltage is increased and the resistance stays the same, Current will

• Increase

• Decrease

• Stay the same

• X

Multiple Choice

This circuit has a 24 volt battery and the resistor is 8 ohms. How many amps are running through the circuit?

• 3 Amps

• 192 Amps

• 2 Amps

• 4 Amps

Multiple Choice

A light circuit is operating at 75 Volts. What is the circuit's current if the resistance is 5 Ohms?

• 375 Amps

• 50 Amps

• 15 Amps

• 0.07 Amps

Multiple Choice

How many Volts would we need to produce a current of 8 Amps through a 6 Ohm resistor?

• 1.33 volts

• 24 volts

• 0.75

• 48 volts

Multiple Choice

What is the voltage if a resistance of 25 Ω produces a current of 250 amperes

• 6250V

• 10V

• 0.1 V

• 625 V

Multiple Choice

What is the current produced by a voltage of 240 V through a resistance of 0.2 Ω

• 1200 Amps

• 48 amps

• 0.0008 Amps

• 480 Amps

Poll

Do you know to how calculate the missing variable in Ohm's Law V=IR?