Electric current and its effect
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Transcript of Electric current and its effect
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Electric Current And Its Effects
SUBJECT-SCIENCEClass – 7th
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• Electric components
• Electrochemical cell (cell)
• Battery
• How electric current flows
• Types of circuit
Used keywords:
Battery , Electric components ,Circuit diagram
OVERVIEW
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What is required for these components to work ? What is required for these components to work ?
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Electricity
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Can you tell how will electricity reach to these components?
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Battery When we use it
CellWhen we use it
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Battery or cell are required for it
Battery - because its required more electricityNext
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if we want more amount of electricity then we use Battery
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When we want less amount of electricity then we use cell, it has two terminal (+ve) and (-ve) terminal .
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An electrochemical cell is a device capable of either deriving electrical energy from chemical reactions its have two terminal (+ve)and (–ve). battery is combination of two or more electrochemical cell in series .
DEFINITION OF ELECTROCHEMICAL CELL AND BATTERY DEFINITION OF ELECTROCHEMICAL CELL AND BATTERY
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Batteries!
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Electric Current:• The flow of electric charges.
Lower potential (- ve)
Higher Potential (+ ve)
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Battery (Chemical Cell):• A device that converts chemical energy to electricity.
• A battery provides a potential energy difference (voltage source).
https://www.youtube.com/watch?v=pgmoad7hvtc
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Type of circuit
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• A Series Circuit is a circuit whose components are connected in a single loop
• In a Series Circuit, the Current I flowing through each component is the same but Voltage across each component can be different.
Serial circuit
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• Resisters are connected in separate branches
• There is more than one path for current
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Parallel Circuit
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ASSESSMENT QUESTIONQUES. See the picture below and give answers.
1. Would any of the bulb glow when the switch is in the ‘OFF’ position ?
2. What will be the order in which the bulbs A,B and C will glow when the switch in moved to the ‘ON’ position ?
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Reference
• http://www.youtube.com/watch?v=NVcvD3exIto•NCERT Book