Power and Work Done OALH DSP

Do Now

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1.Name the two types of circuits.

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How is current distributed through components in series?

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3. What is the most common disadvantage of renewable energy resources?

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Define an anomalous result.

1

Convert 2.5kHz to Hz

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Describe how the current is distributed through components in parallel.

Key Knowledge LCWC

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What is (electrical) power?

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What are the units for power?

1

What is the equation linking power, current and potential difference?

1

What is the equation linking power, current and resistance?

1

What is (electrical) power?

1

What are the units for power?

1

What is the equation linking power, current and potential difference?

1

What is the equation linking power, current and resistance?

Recall Quiz

1

What are the units for power?

1

1.Define electrical power

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Write out the equation linking power (P) current (I) and potential difference (V)

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State the units for current, potential difference and power

YOU DO

1

A 12 V power supply provides a 50mA current through a circuit. Calculate the power

1

1. What is the formula linking power, current and voltage?

1

2. Rearrange this formula to calculate current.

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3. Rearrange this formula to calculate voltage.

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4. A kettle has a current of 10A and a p.d. of 230V. Calculate the power output.

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5. A TV has a current of 80A and a p.d. of 230V. Calculate the power output.

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6. A toaster has a current of 20A and a p.d. of 230V. Calculate the power output.

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7. The heating element in a kettle produces an output of 1200W using mains electricity. Calculate the current flowing through it.

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8. A TV produces an output of 5000W using mains electricity. Calculate the current flowing through it.

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9. A toaster produces an output of 2.5kW using mains electricity. Calculate the current flowing through it.

Plenary

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1.Write two equations to calculate power

1

State units for power

1

Write equation linking potential difference, current and resistance

1

1.State units for resistance

1

State units for potential difference

1

1.Name the two types of circuits.

How is current distributed through components in series?

3. What is the most common disadvantage of renewable energy resources?

Define an anomalous result.

Convert 2.5kHz to Hz

Describe how the current is distributed through components in parallel.

What is (electrical) power?

What are the units for power?

What is the equation linking power, current and potential difference?

What is the equation linking power, current and resistance?

What is (electrical) power?

What are the units for power?

What is the equation linking power, current and potential difference?

What is the equation linking power, current and resistance?

What are the units for power?

1.Define electrical power

Write out the equation linking power (P) current (I) and potential difference (V)

State the units for current, potential difference and power

A 12 V power supply provides a 50mA current through a circuit. Calculate the power

1. What is the formula linking power, current and voltage?

2. Rearrange this formula to calculate current.

3. Rearrange this formula to calculate voltage.

4. A kettle has a current of 10A and a p.d. of 230V. Calculate the power output.

5. A TV has a current of 80A and a p.d. of 230V. Calculate the power output.

6. A toaster has a current of 20A and a p.d. of 230V. Calculate the power output.

7. The heating element in a kettle produces an output of 1200W using mains electricity. Calculate the current flowing through it.

8. A TV produces an output of 5000W using mains electricity. Calculate the current flowing through it.

9. A toaster produces an output of 2.5kW using mains electricity. Calculate the current flowing through it.

1.Write two equations to calculate power

State units for power

Write equation linking potential difference, current and resistance

1.State units for resistance

State units for potential difference

States units for current