1.Describe what happens to the potential difference across components in series.
2. Describe what happens to potential difference across components in parallel
3. Describe what happens to the current through components in a series circuit current
4. a. How are ammeters connected in a circuit?
4. b. How are voltmeters connected in a circuit?
5. State the units for current
Challenge:
The current in a circuit is 10A, calculate the time it takes for 5C of charge to flow through the circuit.
Checking for Understanding - what do I need in my circuit in order to enable current flow?
Checking for Understanding - what is current?
Checking for Understanding - what two factors affect the magnitude of my current?
What is resistance?
What two factors affect how much current can flow through a component?
What is the equation to calculate current (I), potential (V) difference and resistance (R)?
What is Ohm’s Law?
What two factors affect how much current can flow through a component?
2. Write the equation for calculating current (I), potential difference (V) and resistance (R)
3. What is resistance?
4. Ohm’s law states that the current through an Ohmicconductor is directly proportional to the
I do
Calculate the potential difference of a bulb with 0.8A of current and a resistance of 4Ω.
We do
An electrical appliance uses a standard 1.5 V battery. How much resistance is in the circuit if it uses a current of 10 A?
You do
Calculate the current flowing through a hair dryer plugged into a 110 Volt circuit if it has a resistance of 25 Ω
Independent task:
1.A 12 Volt car battery pushes charge through the headlight circuit resistance of 10 ohms. How much current is passing through the circuit?
Independent task:
2.An electric heater works by passing a potential difference of 100V though a coiled metal wire, making it red hot. If the current in the wire is 5A, what is the resistance of the heater?
Independent task:
3. The current through a 12 Wresistor in an electric circuit is 1.5 A. Calculate the potential difference across the resistor.
Independent task:
4. A 50 W resistor in an electric circuit has a potential difference across it of 20 V. Calculate the current through the resistor
Independent task:
5. A resistor in a circuit has a current through it of 0.20 A when the potential difference across it is 15 V. Calculate the resistance of the resistor.