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Ohms Law OALH

Last updated almost 5 years ago
26 questions
Do Now
1

1.Describe what happens to the potential difference across components in series.

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2. Describe what happens to potential difference across components in parallel

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3. Describe what happens to the current through components in a series circuit current

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4. a. How are ammeters connected in a circuit?

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4. b. How are voltmeters connected in a circuit?

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5. State the units for current

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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
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Checking for Understanding - what do I need in my circuit in order to enable current flow?

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Checking for Understanding - what is current?

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Checking for Understanding - what two factors affect the magnitude of my current?

Key Knowledge - LCWC
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What is resistance?

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What two factors affect how much current can flow through a component?

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What is the equation to calculate current (I), potential (V) difference and resistance (R)?

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What is Ohm’s Law?

Recall Quiz
1

What two factors affect how much current can flow through a component?

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2. Write the equation for calculating current (I), potential difference (V) and resistance (R)

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3. What is resistance?

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4. Ohm’s law states that the current through an Ohmicconductor is directly proportional to the

I Do
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I do
Calculate the potential difference of a bulb with 0.8A of current and a resistance of 4Ω.

We Do
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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
1

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
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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?

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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?

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Independent task:
3. The current through a 12 Wresistor in an electric circuit is 1.5 A. Calculate the potential difference across the resistor.

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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

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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.