10 Questions
Where is electricity used in our homes?
For lighting, operating various appliances, and for heating purposes
What are the outermost electrons of an atom called?
Free electrons
What do the free electrons do when imparted a little energy by an external source?
They start to move in a defined direction and generate electric current in a material
What are the two types of electric charges?
Positive and negative
What is the measure of how much power appliances use?
Watts
What is the most power efficient rating on a scale of 1-5 for household appliances?
5 star rating
What is the flow of electric current actually?
The flow of negatively charged electrons
What is needed for electric current to flow?
Closed circuit and a source of electricity
What is the potential difference that pushes the charge and makes it flow in a circuit?
Difference in potential of the two ends of the battery
What is the direction of flow of the electrons in a circuit?
Opposite to the flow of current
Study Notes
Electricity in Homes
- Electricity is used in various applications in our homes, including lighting, heating, cooling, and powering appliances.
Atomic Structure
- The outermost electrons of an atom are called valence electrons.
Free Electrons
- When imparted a little energy by an external source, free electrons gain kinetic energy and start moving freely.
Electric Charges
- There are two types of electric charges: positive and negative charges.
Power Measurement
- The measure of how much power appliances use is called wattage, measured in watts (W).
Power Efficiency
- The most power efficient rating on a scale of 1-5 for household appliances is 5, indicating the highest energy efficiency.
Electric Current
- The flow of electric current is actually the flow of electrons.
Electric Current Flow
- For electric current to flow, there must be a closed path or circuit, a conductor, and a potential difference.
Potential Difference
- The potential difference, measured in volts (V), pushes the charge and makes it flow in a circuit.
Electron Flow Direction
- The direction of flow of electrons in a circuit is from negative to positive terminals.
Test your knowledge about the usage of electricity in modern times, including its applications in homes, industries, and transport. Learn about its role in lighting, operating appliances, industrial machinery, electric trains, and vehicles.
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