Electricity Current.

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Presentation transcript:

Electricity Current

Starter Using only… one wire, one battery & one bulb To be able to draw and interpret circuit diagrams. To know what is meant by current, charge and potential difference. To be able to calculate charge flow. Keywords: Current, potential difference, circuit, charge, amperes, coulombs Starter Using only… one wire, one battery & one bulb try and light the bulb. You can not cut the wire.

To be able to draw and interpret circuit diagrams. To know what is meant by current, charge and potential difference. To be able to calculate charge flow. Keywords: Current, potential difference, circuit, charge, amperes, coulombs Starter Remember: For electrical charge to flow through a closed circuit the circuit must include a source of potential difference.

To be able to draw and interpret circuit diagrams. To know what is meant by current, charge and potential difference. To be able to calculate charge flow. Keywords: Current, potential difference, circuit, charge, amperes, coulombs What is electricity? Current: The flow of electrical charge (electrons).

Electrical Charge The is the rate of flow of electrical charge. To be able to draw and interpret circuit diagrams. To know what is meant by current, charge and potential difference. To be able to calculate charge flow. Keywords: Current, potential difference, circuit, charge, amperes, coulombs Electrical Charge The is the rate of flow of electrical charge. This is calculated using the equation: Charge flow = Current x Time Q = I x t

Charge flow = Current x Time Q = I x t To be able to draw and interpret circuit diagrams. To know what is meant by current, charge and potential difference. To be able to calculate charge flow. Keywords: Current, potential difference, circuit, charge, amperes, coulombs Charge flow = Current x Time Q = I x t Q - Charge is measured in Coulombs, C I - Current is measured in Amperes, A t - Time is measured in seconds, s

Charge flow = Current x Time Q = I x t To be able to draw and interpret circuit diagrams. To know what is meant by current, charge and potential difference. To be able to calculate charge flow. Keywords: Current, potential difference, circuit, charge, amperes, coulombs Charge flow = Current x Time Q = I x t If 4A flows for 60 seconds, what is the charge flow?

Charge flow = Current x Time Q = I x t To be able to draw and interpret circuit diagrams. To know what is meant by current, charge and potential difference. To be able to calculate charge flow. Keywords: Current, potential difference, circuit, charge, amperes, coulombs Charge flow = Current x Time Q = I x t If 4A flows for 60 seconds, what is the charge flow? 4 x 60 = 240C

Now you do some, (give answers to 1 decimal place)… To be able to draw and interpret circuit diagrams. To know what is meant by current, charge and potential difference. To be able to calculate charge flow. Keywords: Current, potential difference, circuit, charge, amperes, coulombs Now you do some, (give answers to 1 decimal place)… 1 Q= 6 I= 5 t= ? 2 Q= 412 I= 12 t= ? 3 Q= 12 I= ? t= 20 4 Q= ? I= 150 t= 20 5 Q= 2 I= ? t= 20 6 Q= ? I= 13 t= 20 7 Q= ? I= 8 t= 18 = 1.2s = 34.3s = 0.6A = 3000C = 0.1A = 260C = 144C

Past Paper Question…